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Investment Securities - Securities Available for Sale (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 2,634,761 $ 2,526,644
Allowance for Credit Loss 775 0
Net Carrying Amount 2,633,986  
Gross Unrealized Gains 5,533 699
Gross Unrealized Losses (212,785) (280,504)
Fair Value 2,426,734 2,246,839
Interest Receivable 12,200 12,600
Agency residential MBS    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 991,290 1,051,601
Allowance for Credit Loss 0  
Net Carrying Amount 991,290  
Gross Unrealized Gains 0 0
Gross Unrealized Losses (147,135) (189,761)
Fair Value 844,155 861,840
Agency commercial MBS    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 52,012 52,610
Allowance for Credit Loss 0  
Net Carrying Amount 52,012  
Gross Unrealized Gains 51 0
Gross Unrealized Losses (1,181) (1,046)
Fair Value 50,882 51,564
Agency residential CMOs    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 794,497 467,319
Allowance for Credit Loss 0  
Net Carrying Amount 794,497  
Gross Unrealized Gains 3,756 223
Gross Unrealized Losses (16,271) (20,911)
Fair Value 781,982 446,631
Municipal securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost   602
Gross Unrealized Gains   0
Gross Unrealized Losses   (8)
Fair Value   594
Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 276,498 289,098
Allowance for Credit Loss 775  
Net Carrying Amount 275,723  
Gross Unrealized Gains 640 0
Gross Unrealized Losses (19,415) (31,386)
Fair Value 256,948 257,712
Private label residential CMOs    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 286,280 352,615
Allowance for Credit Loss 0  
Net Carrying Amount 286,280  
Gross Unrealized Gains 526 7
Gross Unrealized Losses (28,113) (35,712)
Fair Value 258,693 316,910
Collateralized loan obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 205,993 278,976
Allowance for Credit Loss 0  
Net Carrying Amount 205,993  
Gross Unrealized Gains 553 469
Gross Unrealized Losses (72) (29)
Fair Value 206,474 279,416
Private label commercial MBS    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 10,681 13,585
Allowance for Credit Loss 0  
Net Carrying Amount 10,681  
Gross Unrealized Gains 0 0
Gross Unrealized Losses (407) (1,213)
Fair Value 10,274 12,372
Asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 13,875 15,674
Allowance for Credit Loss 0  
Net Carrying Amount 13,875  
Gross Unrealized Gains 7 0
Gross Unrealized Losses 0 (74)
Fair Value 13,882 15,600
SBA securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 3,635 4,564
Allowance for Credit Loss 0  
Net Carrying Amount 3,635  
Gross Unrealized Gains 0 0
Gross Unrealized Losses (191) (364)
Fair Value $ 3,444 $ 4,200