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Fair Value of Financial Instruments - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Assets:    
Estimated Fair Value $ 1,688,768 $ 895,034
Derivatives 103,228 103,603
Liabilities:    
Derivatives 116,513 105,255
GSE debentures    
Assets:    
Estimated Fair Value 173,677 176,294
GSE CMOs    
Assets:    
Estimated Fair Value 496,570 55,543
GSE MBSs    
Assets:    
Estimated Fair Value 325,745 148,285
Municipal obligations    
Assets:    
Estimated Fair Value 240,216 20,254
Corporate debt obligations    
Assets:    
Estimated Fair Value 40,023 12,287
U.S. Treasury bonds    
Assets:    
Estimated Fair Value 412,037 481,872
Foreign government obligations    
Assets:    
Estimated Fair Value 500 499
Recurring basis | Interest rate derivatives    
Assets:    
Derivatives 185 18
Liabilities:    
Derivatives 179 2,051
Recurring basis | Loan level derivatives    
Assets:    
Derivatives 102,237 102,608
Liabilities:    
Derivatives 115,937 102,608
Recurring basis | Risk participation-out agreements    
Assets:    
Derivatives 532 495
Recurring basis | Foreign exchange contracts    
Assets:    
Derivatives 274 482
Liabilities:    
Derivatives 258 459
Recurring basis | Risk participation-in agreements    
Liabilities:    
Derivatives 139 137
Recurring basis | Investment securities available-for-sale    
Assets:    
Estimated Fair Value 1,688,768 895,034
Recurring basis | GSE debentures    
Assets:    
Estimated Fair Value 173,677 176,294
Recurring basis | GSE CMOs    
Assets:    
Estimated Fair Value 496,570 55,543
Recurring basis | GSE MBSs    
Assets:    
Estimated Fair Value 325,745 148,285
Recurring basis | Municipal obligations    
Assets:    
Estimated Fair Value 240,216 20,254
Recurring basis | Corporate debt obligations    
Assets:    
Estimated Fair Value 40,023 12,287
Recurring basis | U.S. Treasury bonds    
Assets:    
Estimated Fair Value 412,037 481,872
Recurring basis | Foreign government obligations    
Assets:    
Estimated Fair Value 500 499
Recurring basis | Level 1 | Interest rate derivatives    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Recurring basis | Level 1 | Loan level derivatives    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Recurring basis | Level 1 | Risk participation-out agreements    
Assets:    
Derivatives 0 0
Recurring basis | Level 1 | Foreign exchange contracts    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Recurring basis | Level 1 | Risk participation-in agreements    
Liabilities:    
Derivatives 0 0
Recurring basis | Level 1 | Investment securities available-for-sale    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 1 | GSE debentures    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 1 | GSE CMOs    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 1 | GSE MBSs    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 1 | Municipal obligations    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 1 | Corporate debt obligations    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 1 | U.S. Treasury bonds    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 1 | Foreign government obligations    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 2 | Interest rate derivatives    
Assets:    
Derivatives 185 18
Liabilities:    
Derivatives 179 2,051
Recurring basis | Level 2 | Loan level derivatives    
Assets:    
Derivatives 102,237 102,608
Liabilities:    
Derivatives 115,937 102,608
Recurring basis | Level 2 | Risk participation-out agreements    
Assets:    
Derivatives 532 495
Recurring basis | Level 2 | Foreign exchange contracts    
Assets:    
Derivatives 274 482
Liabilities:    
Derivatives 258 459
Recurring basis | Level 2 | Risk participation-in agreements    
Liabilities:    
Derivatives 139 137
Recurring basis | Level 2 | Investment securities available-for-sale    
Assets:    
Estimated Fair Value 1,666,800 875,544
Recurring basis | Level 2 | GSE debentures    
Assets:    
Estimated Fair Value 173,677 176,294
Recurring basis | Level 2 | GSE CMOs    
Assets:    
Estimated Fair Value 496,570 55,543
Recurring basis | Level 2 | GSE MBSs    
Assets:    
Estimated Fair Value 325,745 148,285
Recurring basis | Level 2 | Municipal obligations    
Assets:    
Estimated Fair Value 221,604 3,198
Recurring basis | Level 2 | Corporate debt obligations    
Assets:    
Estimated Fair Value 36,667 9,853
Recurring basis | Level 2 | U.S. Treasury bonds    
Assets:    
Estimated Fair Value 412,037 481,872
Recurring basis | Level 2 | Foreign government obligations    
Assets:    
Estimated Fair Value 500 499
Recurring basis | Level 3 | Interest rate derivatives    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Recurring basis | Level 3 | Loan level derivatives    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Recurring basis | Level 3 | Risk participation-out agreements    
Assets:    
Derivatives 0 0
Recurring basis | Level 3 | Foreign exchange contracts    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Recurring basis | Level 3 | Risk participation-in agreements    
Liabilities:    
Derivatives 0 0
Recurring basis | Level 3 | Investment securities available-for-sale    
Assets:    
Estimated Fair Value 21,968 19,490
Recurring basis | Level 3 | GSE debentures    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 3 | GSE CMOs    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 3 | GSE MBSs    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 3 | Municipal obligations    
Assets:    
Estimated Fair Value 18,612 17,056
Recurring basis | Level 3 | Corporate debt obligations    
Assets:    
Estimated Fair Value 3,356 2,434
Recurring basis | Level 3 | U.S. Treasury bonds    
Assets:    
Estimated Fair Value 0 0
Recurring basis | Level 3 | Foreign government obligations    
Assets:    
Estimated Fair Value $ 0 $ 0