XML 83 R67.htm IDEA: XBRL DOCUMENT v3.25.0.1
Investment Securities - Summary of Securities Available for Sale (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Debt securities AFS:        
Amortized Cost   $ 2,122,680,000 $ 2,429,808,000  
Gross Unrealized Gains   337,000 6,199,000  
Gross Unrealized Losses   (299,774,000) (290,948,000)  
Fair Value   1,823,243,000 2,145,059,000  
Debt securities HTM:        
Amortized Cost   252,385,000 263,912,000  
Gross Unrealized Gains   0 0  
Gross Unrealized Losses   (21,261,000) (13,394,000)  
Fair Value   231,124,000 250,518,000  
Accrued interest receivable for investment securities available for sale   $ 7,600,000 $ 11,000,000.0  
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]   Accrued interest receivable Accrued interest receivable  
Unrealized gains on securities available for sale net of taxes   $ (227,872,000) $ (204,738,000)  
Net gains on sales of securities available for sale   936,000 0 $ 0
Available-for-sale Securities        
Debt securities HTM:        
Unrealized gains on securities available for sale net of taxes   (210,500,000) (200,200,000)  
CMOs        
Debt securities AFS:        
Amortized Cost   861,179,000 888,631,000  
Gross Unrealized Gains   152,000 367,000  
Gross Unrealized Losses   (139,425,000) (141,279,000)  
Fair Value   721,906,000 747,719,000  
Residential        
Debt securities AFS:        
Amortized Cost   473,099,000 499,431,000  
Gross Unrealized Gains   0 0  
Gross Unrealized Losses   (86,039,000) (79,133,000)  
Fair Value   387,060,000 420,298,000  
Debt securities HTM:        
Amortized Cost   142,059,000 150,369,000  
Gross Unrealized Gains   0 0  
Gross Unrealized Losses   (12,629,000) (6,663,000)  
Fair Value   129,430,000 143,706,000  
Corporate securities        
Debt securities AFS:        
Amortized Cost   23,254,000 23,302,000  
Gross Unrealized Gains   0 0  
Gross Unrealized Losses   (2,560,000) (3,868,000)  
Fair Value   20,694,000 19,434,000  
Municipal securities        
Debt securities AFS:        
Amortized Cost   191,138,000 314,554,000  
Gross Unrealized Gains   28,000 5,698,000  
Gross Unrealized Losses   (15,615,000) (11,779,000)  
Fair Value   $ 175,551,000 308,473,000  
Non-US Government and Agency Securities | Credit concentration risk | Stockholders' equity        
Debt securities HTM:        
Maximum exposure to any single issuer 10.00% 10.00%    
Asset-backed securities        
Debt securities AFS:        
Amortized Cost   $ 103,081,000 150,992,000  
Gross Unrealized Gains   157,000 0  
Gross Unrealized Losses   (14,000) (1,322,000)  
Fair Value   103,224,000 149,670,000  
U.S. Treasury securities        
Debt securities AFS:        
Amortized Cost   0 103,691,000  
Gross Unrealized Gains   0 21,000  
Gross Unrealized Losses   0 (35,000)  
Fair Value   0 103,677,000  
Agency securities        
Debt securities AFS:        
Amortized Cost   4,000,000 4,000,000  
Gross Unrealized Gains   0 0  
Gross Unrealized Losses   (43,000) (100,000)  
Fair Value   3,957,000 3,900,000  
Commercial        
Debt securities AFS:        
Amortized Cost   466,929,000 445,207,000  
Gross Unrealized Gains   0 113,000  
Gross Unrealized Losses   (56,078,000) (53,432,000)  
Fair Value   410,851,000 391,888,000  
Debt securities HTM:        
Amortized Cost   110,326,000 113,543,000  
Gross Unrealized Gains   0 0  
Gross Unrealized Losses   (8,632,000) (6,731,000)  
Fair Value   $ 101,694,000 $ 106,812,000