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Investment Securities (Tables)
 3 Months Ended
Mar. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of Amortized Cost of Securities and Fair Values
The following tables summarize the amortized cost, allowance for credit losses and fair value of the AFS debt securities and the corresponding amounts of unrealized gains and losses recognized in accumulated other comprehensive loss, net at March 31, 2025 and December 31, 2024:  
March 31, 2025
 Amortized cost Gross unrealized gains Gross unrealized losses Allowance for credit losses on investments Fair Value
Investment Securities    
AFS debt securities  
U.S. government agency securities$604,416 $417 $(1,891)$— $602,942 
Mortgage-backed securities - residential917,760 147 (101,351)— 816,556 
Mortgage-backed securities - commercial 15,724 — (896)— 14,828 
Municipal securities169,993 26 (24,623)— 145,396 
Corporate securities1,000 — (2)— 998 
Total$1,708,893 $590 $(128,763)$— $1,580,720 
December 31, 2024
 Amortized costGross unrealized gains Gross unrealized losses Allowance for credit losses on investmentsFair Value
Investment Securities    
AFS debt securities    
U.S. government agency securities$564,752 $172 $(1,917)$— $563,007 
Mortgage-backed securities - residential927,883 393 (117,277)— 810,999 
Mortgage-backed securities - commercial15,965 — (1,108)— 14,857 
Municipal securities169,498 20 (21,661)— 147,857 
U.S. Treasury securities299 — — — 299 
Corporate securities1,000 — (11)— 989 
Total$1,679,397 $585 $(141,974)$— $1,538,008 
Schedule of Gross Unrealized Losses
The following tables show gross unrealized losses on AFS debt securities for which an allowance for credit losses has not been recorded at March 31, 2025 and December 31, 2024, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position:
March 31, 2025
 Less than 12 months12 months or moreTotal
 Fair ValueGross Unrealized Loss Fair ValueGross Unrealized LossFair ValueGross Unrealized Loss
U.S. government agency securities$463,989 $(1,603)$30,129 $(288)$494,118 $(1,891)
Mortgage-backed securities - residential206,838 (3,976)441,419 (97,375)648,257 (101,351)
Mortgage-backed securities - commercial2,216 (12)12,612 (884)14,828 (896)
Municipal securities33,641 (2,951)107,585 (21,672)141,226 (24,623)
Corporate securities— — 998 (2)998 (2)
Total$706,684 $(8,542)$592,743 $(120,221)$1,299,427 $(128,763)
 December 31, 2024
 Less than 12 months12 months or moreTotal
 Fair ValueGross Unrealized LossFair ValueGross Unrealized LossFair ValueGross Unrealized Loss
U.S. government agency securities$494,885 $(1,908)$714 $(9)$495,599 $(1,917)
Mortgage-backed securities - residential209,078 (8,956)441,502 (108,321)650,580 (117,277)
Mortgage-backed securities - commercial2,222 (19)12,635 (1,089)14,857 (1,108)
Municipal securities34,059 (2,376)110,173 (19,285)144,232 (21,661)
Corporate securities— — 989 (11)989 (11)
Total$740,244 $(13,259)$566,013 $(128,715)$1,306,257 $(141,974)
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity
March 31,December 31,
 2025 2024 
 Available-for-saleAvailable-for-sale
 Amortized costFair ValueAmortized costFair Value
Due in one year or less$305 $304 $849 $847 
Due in one to five years5,267 5,207 4,186 4,600 
Due in five to ten years247,933 245,040 225,954 222,943 
Due in over ten years521,904 498,785 504,560 483,762 
775,409 749,336 735,549 712,152 
Mortgage-backed securities - residential917,760 816,556 927,883 810,999 
Mortgage-backed securities - commercial15,724 14,828 15,965 14,857 
Total AFS debt securities$1,708,893 $1,580,720 $1,679,397 $1,538,008 
Schedule of Sales and Other Dispositions of Available-for-Sale Securities
Sales and other dispositions of AFS debt securities were as follows:
 Three Months Ended March 31,
 2025 2024 
Proceeds from sales$— $207,882 
Proceeds from maturities, prepayments and calls74,860 66,627 
Gross realized gains16 90 
Gross realized losses— 16,303