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Investment Securities - Schedule of Investment in AFS and HTM Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 1,161,644 $ 1,408,935
Gross Unrealized Gains 237 36
Gross Unrealized Losses (88,469) (141,545)
Allowance for Credit Losses 0 (22)
Estimated Fair Value 1,073,412 1,267,404
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 873,617 939,953
Gross Unrealized Gains 25 0
Gross Unrealized Losses (86,980) (119,571)
Estimated Fair Value 786,662 820,382
Less: allowance for credit losses (1,199) (1,306)
Total investment securities held-to-maturity 872,418 938,647
U.S. treasury bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost   24,988
Gross Unrealized Gains   0
Gross Unrealized Losses   (212)
Allowance for Credit Losses   0
Estimated Fair Value   24,776
U.S. agency securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 432,607 600,277
Gross Unrealized Gains 0 0
Gross Unrealized Losses (20,394) (41,742)
Allowance for Credit Losses 0 0
Estimated Fair Value 412,213 558,535
Residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 644,193 719,815
Gross Unrealized Gains 108 36
Gross Unrealized Losses (64,701) (94,535)
Allowance for Credit Losses 0 0
Estimated Fair Value 579,600 625,316
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 558,842 605,904
Gross Unrealized Gains 0 0
Gross Unrealized Losses (62,442) (85,941)
Estimated Fair Value 496,400 519,963
Commercial mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 74,372 53,248
Gross Unrealized Gains 129 0
Gross Unrealized Losses (2,783) (4,303)
Allowance for Credit Losses 0 0
Estimated Fair Value 71,718 48,945
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 86,359 88,575
Gross Unrealized Gains 0 0
Gross Unrealized Losses (10,414) (13,069)
Estimated Fair Value 75,945 75,506
Municipal bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 8,472 8,607
Gross Unrealized Gains 0 0
Gross Unrealized Losses (532) (593)
Allowance for Credit Losses 0 0
Estimated Fair Value 7,940 8,014
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 106,936 114,060
Gross Unrealized Gains 0 0
Gross Unrealized Losses (8,109) (11,389)
Estimated Fair Value 98,827 102,671
Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 2,000 2,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses (59) (160)
Allowance for Credit Losses 0 (22)
Estimated Fair Value 1,941 1,818
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 121,480 131,414
Gross Unrealized Gains 25 0
Gross Unrealized Losses (6,015) (9,172)
Estimated Fair Value $ 115,490 $ 122,242