v3.24.3
Loans and Allowance for Credit Losses on Loans - Loans by Investment Grade (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year $ 1,455,733   $ 2,183,954
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 2,162,639   3,497,551
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 3,470,100   1,490,895
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 1,373,941   657,182
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 472,492   524,006
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 1,176,900   893,218
Revolving lines of credit 12,236,841   11,129,125
Revolving lines of credit converted to term loans 32,596   44,885
Total 22,381,242   20,420,816
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff 0   8,364
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff 7,542   5,090
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff 550   25,578
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff 3,775   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff 0   15,243
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year, writeoff 7,212   883
Revolving lines of credit, writeoff 10,266   698
Revolving line of credit converted to term loans, writeoff 44   871
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 29,389 $ 42,871 56,727
Commercial      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 1,227,534   1,590,277
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 1,283,909   1,612,768
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 1,540,404   324,559
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 367,783   165,616
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 92,219   158,204
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 229,599   179,111
Revolving lines of credit 6,213,594   6,363,562
Revolving lines of credit converted to term loans 12,765   16,669
Total 10,967,807   10,410,766
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 23,661 42,830  
Commercial | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 1,206,729   1,546,257
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 1,189,307   1,408,672
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 1,330,253   279,266
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 336,556   144,699
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 90,941   142,301
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 194,600   157,808
Revolving lines of credit 5,939,588   6,284,464
Revolving lines of credit converted to term loans 12,458   16,580
Total 10,300,432   9,980,047
Commercial | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 20,805   22,148
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 39,957   118,991
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 146,912   35,619
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 22,833   285
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 40   823
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 6,754   13,385
Revolving lines of credit 197,723   40,647
Revolving lines of credit converted to term loans 0   89
Total 435,024   231,987
Commercial | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   12,477
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 45,275   50,876
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 60,646   9,334
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 8,107   18,547
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 341   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 3,435   78
Revolving lines of credit 28,734   38,372
Revolving lines of credit converted to term loans 0   0
Total 146,538   129,684
Commercial | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   9,395
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 9,370   34,229
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 2,593   340
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 287   2,085
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 897   15,080
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 24,810   7,840
Revolving lines of credit 47,549   79
Revolving lines of credit converted to term loans 307   0
Total 85,813   69,048
Mortgage finance      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 5,529,659   3,978,328
Revolving lines of credit converted to term loans 0   0
Total 5,529,659   3,978,328
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 0 0  
Mortgage finance | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 5,529,659   3,978,328
Revolving lines of credit converted to term loans 0   0
Total 5,529,659   3,978,328
Mortgage finance | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 0   0
Mortgage finance | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 0   0
Mortgage finance | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 0   0
Commercial real estate      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 193,654   561,801
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 849,989   1,828,358
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 1,875,955   1,088,240
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 929,319   444,143
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 333,574   351,661
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 836,775   610,432
Revolving lines of credit 275,717   587,964
Revolving lines of credit converted to term loans 19,831   28,175
Total 5,314,814   5,500,774
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 5,698 0  
Commercial real estate | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 193,065   561,801
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 844,988   1,689,325
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 1,751,369   1,042,953
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 913,488   419,703
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 333,252   317,480
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 755,864   559,026
Revolving lines of credit 275,717   575,928
Revolving lines of credit converted to term loans 18,933   28,175
Total 5,086,676   5,194,391
Commercial real estate | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 589   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 5,001   136,801
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 77,796   32,937
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   24,440
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 322   34,181
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 59,922   22,833
Revolving lines of credit 0   7,895
Revolving lines of credit converted to term loans 898   0
Total 144,528   259,087
Commercial real estate | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   2,232
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 44,607   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 15,831   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 20,989   28,573
Revolving lines of credit 0   4,141
Revolving lines of credit converted to term loans 0   0
Total 81,427   34,946
Commercial real estate | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 2,183   12,350
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 2,183   12,350
Consumer      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 34,545   31,876
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 28,741   56,425
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 53,741   78,096
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 76,839   47,423
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 46,699   14,141
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 110,526   103,675
Revolving lines of credit 217,871   199,271
Revolving lines of credit converted to term loans 0   41
Total 568,962   530,948
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 30 $ 41  
Consumer | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 34,545   31,876
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 28,741   56,425
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 53,741   78,096
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 76,839   47,423
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 46,699   14,141
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 109,562   102,691
Revolving lines of credit 216,621   199,171
Revolving lines of credit converted to term loans 0   0
Total 566,748   529,823
Consumer | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 250   100
Revolving lines of credit converted to term loans 0   41
Total 250   141
Consumer | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   984
Revolving lines of credit 1,000   0
Revolving lines of credit converted to term loans 0   0
Total 1,000   984
Consumer | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 964   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total $ 964   $ 0