v3.25.2
Investment Securities - Other-Than-Temporary Impairment (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Investment securities available-for-sale:    
Less than twelve months, estimated fair value $ 3,892 $ 117,451
Less than twelve months, unrealized losses 96 1,343
Twelve months or longer, estimated fair value 591,022 587,823
Twelve months or longer, unrealized losses 53,405 68,879
Debt securities, available-for-sale, unrealized loss position 594,914 705,274
Total, unrealized losses 53,501 70,222
Total temporarily impaired investment securities    
Less than twelve months, estimated fair value 3,892 117,451
Less than twelve months, unrealized losses 96 1,343
Twelve months or longer, estimated fair value 591,022 587,823
Twelve months or longer, unrealized losses 53,405 68,879
Total, estimated fair value 594,914 705,274
Total, unrealized losses 53,501 70,222
GSE debentures    
Investment securities available-for-sale:    
Less than twelve months, estimated fair value 0 30,753
Less than twelve months, unrealized losses 0 281
Twelve months or longer, estimated fair value 126,331 107,750
Twelve months or longer, unrealized losses 14,617 18,749
Debt securities, available-for-sale, unrealized loss position 126,331 138,503
Total, unrealized losses 14,617 19,030
GSE CMOs    
Investment securities available-for-sale:    
Less than twelve months, estimated fair value 0 4,664
Less than twelve months, unrealized losses 0 107
Twelve months or longer, estimated fair value 48,791 50,334
Twelve months or longer, unrealized losses 6,466 6,921
Debt securities, available-for-sale, unrealized loss position 48,791 54,998
Total, unrealized losses 6,466 7,028
GSE MBSs    
Investment securities available-for-sale:    
Less than twelve months, estimated fair value 3,237 11,128
Less than twelve months, unrealized losses 88 596
Twelve months or longer, estimated fair value 132,244 131,481
Twelve months or longer, unrealized losses 14,260 18,025
Debt securities, available-for-sale, unrealized loss position 135,481 142,609
Total, unrealized losses 14,348 18,621
Municipal obligations    
Investment securities available-for-sale:    
Less than twelve months, estimated fair value 655 3,616
Less than twelve months, unrealized losses 8 74
Twelve months or longer, estimated fair value 6,888 3,568
Twelve months or longer, unrealized losses 302 217
Debt securities, available-for-sale, unrealized loss position 7,543 7,184
Total, unrealized losses 310 291
Corporate debt obligations    
Investment securities available-for-sale:    
Less than twelve months, estimated fair value 0 0
Less than twelve months, unrealized losses 0 0
Twelve months or longer, estimated fair value 2,364 2,550
Twelve months or longer, unrealized losses 287 78
Debt securities, available-for-sale, unrealized loss position 2,364 2,550
Total, unrealized losses 287 78
U.S. Treasury bonds    
Investment securities available-for-sale:    
Less than twelve months, estimated fair value 0 67,290
Less than twelve months, unrealized losses 0 285
Twelve months or longer, estimated fair value 274,404 291,641
Twelve months or longer, unrealized losses 17,473 24,888
Debt securities, available-for-sale, unrealized loss position 274,404 358,931
Total, unrealized losses $ 17,473 25,173
Foreign government obligations    
Investment securities available-for-sale:    
Less than twelve months, estimated fair value   0
Less than twelve months, unrealized losses   0
Twelve months or longer, estimated fair value   499
Twelve months or longer, unrealized losses   1
Debt securities, available-for-sale, unrealized loss position   499
Total, unrealized losses   $ 1