XML 73 R66.htm IDEA: XBRL DOCUMENT v3.25.3
Stockholders' Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance $ 4,365,419 $ 3,920,718 $ 4,127,636 $ 3,803,661
Reclassification of net loss realized and included in earnings 9,714 13,964 28,797 41,689
Amortization of unrealized net loss on securities transferred to HTM 413 461 1,205 1,279
Income tax (expense) benefit (14,661) (51,688) (56,054) (40,903)
Balance 4,474,479 4,174,687 4,474,479 4,174,687
Accumulated Other Comprehensive Loss Available for Sale Securities [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     (473,679) (450,748)
Net change in unrealized gain (loss)     202,858 132,391
Income tax (expense) benefit     (46,822) (28,958)
Balance (317,643) (347,315) (317,643) (347,315)
Held to Maturity Securities Transferred from AFS [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     (8,071) (9,385)
Amortization of unrealized net loss on securities transferred to HTM     1,205 1,279
Income tax (expense) benefit     (289) (268)
Balance (7,155) (8,374) (7,155) (8,374)
Employee Benefit Plans [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     (77,235) (103,061)
Reclassification of net loss realized and included in earnings     2,623 3,569
Valuation adjustments to employee benefit plans       22,014
Income tax (expense) benefit     (759) (5,555)
Balance (75,371) (83,033) (75,371) (83,033)
Accumulated Other Comprehensive Loss [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (469,827) (657,936) (606,092) (621,127)
Net change in unrealized gain (loss)     215,684 121,552
Reclassification of net loss realized and included in earnings     28,797 41,689
Valuation adjustments to employee benefit plans       22,014
Amortization of unrealized net loss on securities transferred to HTM     1,205 1,279
Income tax (expense) benefit     (56,054) 40,903
Balance (416,460) (475,496) (416,460) (475,496)
Gains and Losses on Cash Flow Hedges [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     (47,136) (58,306)
Net change in unrealized gain (loss)     9,770 (10,495)
Reclassification of net loss realized and included in earnings     26,174 38,120
Income tax (expense) benefit     (8,184) (6,122)
Balance (19,376) (36,803) (19,376) (36,803)
Equity Method Investment [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     29 373
Net change in unrealized gain (loss)     3,056 (344)
Balance $ 3,085 $ 29 $ 3,085 $ 29