v3.26.1
Fair Value of Assets and Liabilities - Schedule of Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities $ 7,587,545   $ 6,236,263 $ 4,885,715    
Equity securities with readily determinable fair value 65,815   63,770 273,722    
Loans held-for-investment 137,673     136,884    
MSRs 201,903 $ 195,276 195,023 193,061 $ 196,307 $ 203,788
U.S. Treasury            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 5,005   7,035 13,018    
U.S. government agencies            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 46,502   47,471 45,824    
Municipal            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 171,148   162,166 180,644    
Measured at fair value on a recurring basis:            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Equity securities with readily determinable fair value 65,815   63,770 273,722    
Mortgage loans held-for-sale 407,495   340,745 299,606    
Loans held-for-investment 137,673   151,590 136,884    
MSRs 201,903   195,023 193,061    
Nonqualified deferred compensation assets 19,043   18,112 17,283    
Derivative assets 129,736   179,667 221,106    
Total 8,549,210   7,185,170 6,027,377    
Derivative liabilities 140,111   123,774 161,402    
Measured at fair value on a recurring basis: | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Equity securities with readily determinable fair value 57,749   55,704 265,656    
Mortgage loans held-for-sale 0   0 0    
Loans held-for-investment 0   0 0    
MSRs 0   0 0    
Nonqualified deferred compensation assets 0   0 0    
Derivative assets 0   0 0    
Total 62,754   62,739 278,674    
Derivative liabilities 0   0 0    
Measured at fair value on a recurring basis: | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Equity securities with readily determinable fair value 8,066   8,066 8,066    
Mortgage loans held-for-sale 359,906   286,931 272,438    
Loans held-for-investment 81,672   95,390 83,847    
MSRs 0   0 0    
Nonqualified deferred compensation assets 19,043   18,112 17,283    
Derivative assets 124,633   176,251 215,558    
Total 8,052,157   6,714,375 5,353,814    
Derivative liabilities 140,111   123,774 161,402    
Measured at fair value on a recurring basis: | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Equity securities with readily determinable fair value 0   0 0    
Mortgage loans held-for-sale 47,589   53,814 27,168    
Loans held-for-investment 56,001   56,200 53,037    
MSRs 201,903   195,023 193,061    
Nonqualified deferred compensation assets 0   0 0    
Derivative assets 5,103   3,416 5,548    
Total 434,299   408,056 394,889    
Derivative liabilities 0   0 0    
Measured at fair value on a recurring basis: | U.S. Treasury            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 5,005   7,035 13,018    
Measured at fair value on a recurring basis: | U.S. Treasury | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 5,005   7,035 13,018    
Measured at fair value on a recurring basis: | U.S. Treasury | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 0   0 0    
Measured at fair value on a recurring basis: | U.S. Treasury | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 0   0 0    
Measured at fair value on a recurring basis: | U.S. government agencies            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 46,502   47,471 45,824    
Measured at fair value on a recurring basis: | U.S. government agencies | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 0   0 0    
Measured at fair value on a recurring basis: | U.S. government agencies | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 46,502   47,471 45,824    
Measured at fair value on a recurring basis: | U.S. government agencies | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 0   0 0    
Measured at fair value on a recurring basis: | Municipal            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 171,148   162,166 180,644    
Measured at fair value on a recurring basis: | Municipal | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 0   0 0    
Measured at fair value on a recurring basis: | Municipal | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 47,445   62,563 64,569    
Measured at fair value on a recurring basis: | Municipal | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 123,703   99,603 116,075    
Measured at fair value on a recurring basis: | Corporate notes            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 74,045   77,295 79,799    
Measured at fair value on a recurring basis: | Corporate notes | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 0   0 0    
Measured at fair value on a recurring basis: | Corporate notes | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 74,045   77,295 79,799    
Measured at fair value on a recurring basis: | Corporate notes | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 0   0 0    
Measured at fair value on a recurring basis: | Mortgage-backed            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 7,290,845   5,942,296 4,566,430    
Measured at fair value on a recurring basis: | Mortgage-backed | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 0   0 0    
Measured at fair value on a recurring basis: | Mortgage-backed | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 7,290,845   5,942,296 4,566,430    
Measured at fair value on a recurring basis: | Mortgage-backed | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities $ 0   $ 0 $ 0