v3.26.1
Securities (Securities Available for Sale with Unrealized Losses) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]    
Available for sale, Losses less than 12 months, Fair Value $ 2,547,285 $ 448,456
Available for sale, Losses less than 12 months, Gross Unrealized Losses 37,471 2,396
Available for sale, Losses 12 months or longer, Fair Value 2,153,585 3,778,408
Available for sale, Losses 12 months or longer, Gross Unrealized Losses 307,742 403,006
Available for sale, Total, Fair Value 4,700,870 4,226,864
Available for sale, Total, Gross Unrealized Losses 345,213 405,402
U.S. Treasury And Government Agency Securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Available for sale, Losses less than 12 months, Fair Value 98,049 17,468
Available for sale, Losses less than 12 months, Gross Unrealized Losses 605 9
Available for sale, Losses 12 months or longer, Fair Value 6,689 14,677
Available for sale, Losses 12 months or longer, Gross Unrealized Losses 1,092 1,189
Available for sale, Total, Fair Value 104,738 32,145
Available for sale, Total, Gross Unrealized Losses 1,697 1,198
Municipal Obligations [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Available for sale, Losses less than 12 months, Fair Value 37,833 0
Available for sale, Losses less than 12 months, Gross Unrealized Losses 150 0
Available for sale, Losses 12 months or longer, Fair Value 49,139 124,852
Available for sale, Losses 12 months or longer, Gross Unrealized Losses 96 508
Available for sale, Total, Fair Value 86,972 124,852
Available for sale, Total, Gross Unrealized Losses 246 508
Residential Mortgage-Backed Securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Available for sale, Losses less than 12 months, Fair Value 404,847 54,250
Available for sale, Losses less than 12 months, Gross Unrealized Losses 5,219 598
Available for sale, Losses 12 months or longer, Fair Value 1,237,483 1,442,746
Available for sale, Losses 12 months or longer, Gross Unrealized Losses 239,054 256,396
Available for sale, Total, Fair Value 1,642,330 1,496,996
Available for sale, Total, Gross Unrealized Losses 244,273 256,994
Commercial Mortgage-Backed Securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Available for sale, Losses less than 12 months, Fair Value 2,003,582 374,740
Available for sale, Losses less than 12 months, Gross Unrealized Losses 31,471 1,787
Available for sale, Losses 12 months or longer, Fair Value 824,963 2,158,865
Available for sale, Losses 12 months or longer, Gross Unrealized Losses 65,822 143,081
Available for sale, Total, Fair Value 2,828,545 2,533,605
Available for sale, Total, Gross Unrealized Losses 97,293 144,868
Collateralized Mortgage Obligations [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Available for sale, Losses less than 12 months, Fair Value 0 0
Available for sale, Losses less than 12 months, Gross Unrealized Losses 0 0
Available for sale, Losses 12 months or longer, Fair Value 21,796 25,946
Available for sale, Losses 12 months or longer, Gross Unrealized Losses 1,193 1,154
Available for sale, Total, Fair Value 21,796 25,946
Available for sale, Total, Gross Unrealized Losses 1,193 1,154
Corporate Debt Securities [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Available for sale, Losses less than 12 months, Fair Value 2,974 1,998
Available for sale, Losses less than 12 months, Gross Unrealized Losses 26 2
Available for sale, Losses 12 months or longer, Fair Value 13,515 11,322
Available for sale, Losses 12 months or longer, Gross Unrealized Losses 485 678
Available for sale, Total, Fair Value 16,489 13,320
Available for sale, Total, Gross Unrealized Losses $ 511 $ 680