v3.25.4
Condensed financial statements of the parent company only - Condensed Balance Sheets (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Assets      
Cash and demand deposits with banks - Non-interest bearing $ 105,440 $ 93,145  
Demand deposits with banks - Interest bearing 171,201 165,741  
Cash equivalents - Interest bearing 1,432,295 1,739,226  
Cash and cash equivalents 1,708,936 1,998,112  
Securities purchased under agreements to resell 1,096,238 1,205,373  
Short-term investments 756,543 580,026  
Investments (none of the investment securities are intrinsically tax-exempt)      
Available-for-sale investments 2,696,253 2,272,486  
Held-to-maturity 2,992,052 3,240,290  
Total investment in securities 5,688,305 5,512,776  
Loans 4,382,411 4,473,591  
Other assets, including accrued interest, premises, equipment and computer software, equity method investments, receivables from subsidiaries and other real estate owned 210,405 211,533  
Total assets 14,094,894 14,231,396  
Deposits      
Non-interest bearing 2,701,145 2,687,877  
Interest bearing 9,996,923 10,058,032  
Total deposits 12,698,068 12,745,909  
Employee benefit plans 84,466 83,589  
Other liabilities, including accrued interest and payables to subsidiaries 170,509 189,799  
Total other liabilities 254,975 365,950  
Long-term debt 0 98,725  
Total liabilities 12,953,043 13,210,584  
Shareholders' equity      
Total shareholders’ equity 1,141,851 1,020,812 $ 1,003,597
Total liabilities and shareholders’ equity 14,094,894 14,231,396  
Available-for-sale, amortized cost 2,785,608 2,435,752  
Held-to-maturity, fair value 2,566,470 2,671,040  
Bank of N.T. Butterfield & Son Ltd      
Assets      
Cash and demand deposits with banks - Non-interest bearing 42,328 36,383  
Demand deposits with banks - Interest bearing 39,026 37,645  
Cash equivalents - Interest bearing 500,808 725,121  
Cash and cash equivalents 582,162 799,149  
Securities purchased under agreements to resell 0 90,674  
Short-term investments 194,658 220,055  
Investments (none of the investment securities are intrinsically tax-exempt)      
Available-for-sale investments 1,565,021 1,323,837  
Held-to-maturity 1,110,056 1,210,265  
Total investment in securities 2,675,077 2,534,102  
Other assets, including accrued interest, premises, equipment and computer software, equity method investments, receivables from subsidiaries and other real estate owned 234,140 229,716  
Total assets 5,864,602 6,136,102  
Deposits      
Non-interest bearing 1,669,092 1,600,902  
Interest bearing 2,912,504 3,272,022  
Total deposits 4,581,596 4,872,924  
Employee benefit plans 84,456 83,578  
Other liabilities, including accrued interest and payables to subsidiaries 56,699 60,063  
Total other liabilities 141,155 143,641  
Long-term debt 0 98,725  
Total liabilities 4,722,751 5,115,290  
Shareholders' equity      
Total shareholders’ equity 1,141,851 1,020,812  
Total liabilities and shareholders’ equity 5,864,602 6,136,102  
Available-for-sale, amortized cost 1,593,811 1,391,401  
Held-to-maturity, fair value 969,388 1,015,441  
Bank of N.T. Butterfield & Son Ltd | Nonrelated Party      
Investments (none of the investment securities are intrinsically tax-exempt)      
Loans 1,444,655 1,578,547  
Bank of N.T. Butterfield & Son Ltd | Related Party      
Investments (none of the investment securities are intrinsically tax-exempt)      
Loans 32,445 31,847  
Bank of N.T. Butterfield & Son Ltd | Banks      
Investments (none of the investment securities are intrinsically tax-exempt)      
Net assets of subsidiaries 625,464 588,843  
Bank of N.T. Butterfield & Son Ltd | Customers      
Investments (none of the investment securities are intrinsically tax-exempt)      
Net assets of subsidiaries $ 76,001 $ 63,169