XML 71 R60.htm IDEA: XBRL DOCUMENT v3.25.3
Investment Securities - Securities with gross unrealized losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Securities Held to Maturity, Gross Unrealized Losses    
Twelve Months or More $ 331,240 $ 420,143
Securities Held to Maturity, Fair Value    
Twelve Months or More 1,765,487 1,834,527
Securities Available for Sale, Gross Unrealized Losses    
Less Than Twelve Months 2,765 2,594
Twelve Months or More 453,391 806,730
Securities Available for Sale, Fair Value    
Less Than Twelve Months 550,116 93,830
Twelve Months or More 2,689,366 4,113,658
U.S. Government agencies    
Securities Held to Maturity, Gross Unrealized Losses    
Twelve Months or More 16,729 23,498
Securities Held to Maturity, Fair Value    
Twelve Months or More 116,182 123,774
Securities Available for Sale, Gross Unrealized Losses    
Twelve Months or More   18,789
Securities Available for Sale, Fair Value    
Twelve Months or More   150,418
Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises    
Securities Held to Maturity, Gross Unrealized Losses    
Twelve Months or More 186,684 241,204
Securities Held to Maturity, Fair Value    
Twelve Months or More 1,001,134 1,056,339
Securities Available for Sale, Gross Unrealized Losses    
Less Than Twelve Months 484 294
Twelve Months or More 146,753 282,129
Securities Available for Sale, Fair Value    
Less Than Twelve Months 64,033 14,341
Twelve Months or More 839,764 1,350,268
Residential collateralized mortgage-obligations issued by U.S. government agencies or sponsored enterprises    
Securities Held to Maturity, Gross Unrealized Losses    
Twelve Months or More 58,177 72,057
Securities Held to Maturity, Fair Value    
Twelve Months or More 328,600 339,664
Securities Available for Sale, Gross Unrealized Losses    
Less Than Twelve Months 121  
Twelve Months or More 49,669 98,212
Securities Available for Sale, Fair Value    
Less Than Twelve Months 102,208  
Twelve Months or More 302,001 454,908
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises    
Securities Held to Maturity, Gross Unrealized Losses    
Twelve Months or More 60,516 72,391
Securities Held to Maturity, Fair Value    
Twelve Months or More 281,538 275,947
Securities Available for Sale, Gross Unrealized Losses    
Less Than Twelve Months 268 792
Twelve Months or More 76,786 193,788
Securities Available for Sale, Fair Value    
Less Than Twelve Months 56,511 53,342
Twelve Months or More 415,144 918,338
State and municipal obligations    
Securities Available for Sale, Gross Unrealized Losses    
Less Than Twelve Months 372 1,484
Twelve Months or More 151,775 170,125
Securities Available for Sale, Fair Value    
Less Than Twelve Months 9,326 19,400
Twelve Months or More 900,630 923,431
Small Business Administration loan-backed securities    
Securities Held to Maturity, Gross Unrealized Losses    
Twelve Months or More 9,134 10,993
Securities Held to Maturity, Fair Value    
Twelve Months or More 38,033 38,803
Securities Available for Sale, Gross Unrealized Losses    
Less Than Twelve Months 1,520 24
Twelve Months or More 26,885 41,697
Securities Available for Sale, Fair Value    
Less Than Twelve Months 318,038 6,747
Twelve Months or More 205,350 289,786
Corporate securities    
Securities Available for Sale, Gross Unrealized Losses    
Twelve Months or More 1,523 1,990
Securities Available for Sale, Fair Value    
Twelve Months or More $ 26,477 $ 26,509