v3.26.3
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ 8,583,843 $ 8,126,387 $ 8,494,788 $ 6,340,350
Other comprehensive income (loss) before reclassifications (395,027) 69,780 (482,306) 207,405
Amounts reclassified from AOCI to income 3,782 5,437 11,591 14,247
Ending balance 8,295,211 8,309,271 8,295,211 8,309,271
Accumulated Other Comprehensive Income (Loss)        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (558,141) (599,608) (478,671) (746,043)
Ending balance (949,386) (524,391) (949,386) (524,391)
Unrealized Gains and Losses on Available-for-Sale Debt Securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (500,147) (542,158) (428,436) (668,063)
Other comprehensive income (loss) before reclassifications (351,747) 70,964 (423,428) 196,782
Amounts reclassified from AOCI to income (4) (5) (34) 82
Ending balance (851,898) (471,199) (851,898) (471,199)
Unrecognized Gains and Losses on Held-to-Maturity Securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (65,100) (76,336) (70,464) (82,294)
Other comprehensive income (loss) before reclassifications 0 0 0 0
Amounts reclassified from AOCI to income 2,927 3,014 8,291 8,972
Ending balance (62,173) (73,322) (62,173) (73,322)
Gains and Losses on Hedges        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 7,106 18,886 20,229 4,314
Other comprehensive income (loss) before reclassifications (43,280) (1,184) (58,878) 10,623
Amounts reclassified from AOCI to income 859 2,428 3,334 5,193
Ending balance $ (35,315) $ 20,130 $ (35,315) $ 20,130