v3.26.3
Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance $ 3,647,707 $ 3,510,070 $ 3,631,382 $ 3,367,936
Change in unrealized gain/(loss) (199,835) 30,909 (249,538) 101,226
Amounts reclassified into net income 2,772 6,172 7,935 26,498
Other comprehensive income/(loss) (197,063) 37,081 (241,603) 127,724
Income tax expense/(benefit) (45,324) 8,374 (55,569) 28,841
Other comprehensive income/(loss), net of tax (151,739) 28,707 (186,034) 98,883
Ending balance 3,487,590 3,637,098 3,487,590 3,637,098
Cash Flow Hedges        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (14,255) (1,372) 3,100 (15,275)
Change in unrealized gain/(loss) (25,035) 78 (49,743) 943
Amounts reclassified into net income 1,214 4,525 3,382 21,618
Other comprehensive income/(loss) (23,821) 4,603 (46,361) 22,561
Income tax expense/(benefit) (5,478) 1,040 (10,663) 5,095
Other comprehensive income/(loss), net of tax (18,343) 3,563 (35,698) 17,466
Ending balance (32,598) 2,191 (32,598) 2,191
Available-for-Sale Securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (55,809) (77,761) (36,563) (131,531)
Change in unrealized gain/(loss) (174,800) 30,831 (199,795) 100,283
Amounts reclassified into net income 0 0 0 0
Other comprehensive income/(loss) (174,800) 30,831 (199,795) 100,283
Income tax expense/(benefit) (40,204) 6,962 (45,953) 22,644
Other comprehensive income/(loss), net of tax (134,596) 23,869 (153,842) 77,639
Ending balance (190,405) (53,892) (190,405) (53,892)
Held-to-Maturity Securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (28,816) (33,798) (31,122) (36,301)
Change in unrealized gain/(loss) 0 0 0 0
Amounts reclassified into net income 1,558 1,647 4,553 4,880
Other comprehensive income/(loss) 1,558 1,647 4,553 4,880
Income tax expense/(benefit) 358 372 1,047 1,102
Other comprehensive income/(loss), net of tax 1,200 1,275 3,506 3,778
Ending balance (27,616) (32,523) (27,616) (32,523)
Total        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (98,880) (112,931) (64,585) (183,107)
Ending balance $ (250,619) $ (84,224) $ (250,619) $ (84,224)