v3.26.1
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ 8,510,653 $ 6,534,654 $ 8,494,788 $ 6,340,350
Other comprehensive income (loss) before reclassifications (18,790) 43,955 (87,279) 137,625
Amounts reclassified from AOCI to income 3,903 4,946 7,809 8,810
Ending balance 8,583,843 8,126,387 8,583,843 8,126,387
Accumulated Other Comprehensive Income (Loss)        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (543,254) (648,509) (478,671) (746,043)
Ending balance (558,141) (599,608) (558,141) (599,608)
Unrealized Gains and Losses on Available-for-Sale Debt Securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (492,459) (582,779) (428,436) (668,063)
Other comprehensive income (loss) before reclassifications (7,714) 40,590 (71,681) 125,818
Amounts reclassified from AOCI to income 26 31 (30) 87
Ending balance (500,147) (542,158) (500,147) (542,158)
Unrecognized Gains and Losses on Held-to-Maturity Securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (67,736) (79,373) (70,464) (82,294)
Other comprehensive income (loss) before reclassifications 0 0 0 0
Amounts reclassified from AOCI to income 2,636 3,037 5,364 5,958
Ending balance (65,100) (76,336) (65,100) (76,336)
Gains and Losses on Hedges        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 16,941 13,643 20,229 4,314
Other comprehensive income (loss) before reclassifications (11,076) 3,365 (15,598) 11,807
Amounts reclassified from AOCI to income 1,241 1,878 2,475 2,765
Ending balance $ 7,106 $ 18,886 $ 7,106 $ 18,886