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Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of AFS and HTM Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 1,330,077 $ 1,408,935
Gross Unrealized Gains 35 36
Gross Unrealized Losses (115,875) (141,545)
Allowance for Credit Losses 0 (22)
Estimated Fair Value 1,214,237 1,267,404
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 925,748 939,953
HTM Allowance for credit losses 1,275 1,306
Total investment securities held-to-maturity 924,473 938,647
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (105,218) (119,571)
Total investment securities held-to-maturity 820,530 820,382
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 570,988 600,277
Gross Unrealized Gains 0 0
Gross Unrealized Losses (33,079) (41,742)
Allowance for Credit Losses 0 0
Estimated Fair Value 537,909 558,535
Residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 695,732 719,815
Gross Unrealized Gains 35 36
Gross Unrealized Losses (78,373) (94,535)
Allowance for Credit Losses 0 0
Estimated Fair Value 617,394 625,316
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 592,109 605,904
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (74,975) (85,941)
Total investment securities held-to-maturity 517,134 519,963
Commercial mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 52,795 53,248
Gross Unrealized Gains 0 0
Gross Unrealized Losses (3,589) (4,303)
Allowance for Credit Losses 0 0
Estimated Fair Value 49,206 48,945
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 88,197 88,575
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (11,485) (13,069)
Total investment securities held-to-maturity 76,712 75,506
Municipal bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 8,562 8,607
Gross Unrealized Gains 0 0
Gross Unrealized Losses (674) (593)
Allowance for Credit Losses 0 0
Estimated Fair Value 7,888 8,014
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 114,001 114,060
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (10,879) (11,389)
Total investment securities held-to-maturity 103,122 102,671
Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 2,000 2,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses (160) (160)
Allowance for Credit Losses 0 (22)
Estimated Fair Value 1,840 1,818
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 131,441 131,414
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (7,879) (9,172)
Total investment securities held-to-maturity $ 123,562 $ 122,242