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Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period $ 5,128,595 $ 3,012,018
Other comprehensive income (loss) before    reclassifications 64,529 (335,286)
Amounts reclassified from AOCI to income 13,535 (538)
Balance at end of period 5,277,426 5,232,114
Accumulated Other Comprehensive Income (Loss)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (786,422) (2,375)
Balance at end of period (708,358) (338,199)
Unrealized Gains and Losses on Available- for-Sale Debt Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (642,346) (2,950)
Other comprehensive income (loss) before    reclassifications 27,219 (311,153)
Amounts reclassified from AOCI to income 3,867 (261)
Balance at end of period (611,260) (314,364)
Unrealized Gains and Losses on Held-to- Maturity Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (112,664) 0
Other comprehensive income (loss) before    reclassifications 1,325 (16,963)
Amounts reclassified from AOCI to income 4,373 236
Balance at end of period (106,966) (16,727)
Gains and Losses on Hedges    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (31,549) 543
Other comprehensive income (loss) before    reclassifications 35,985 (7,170)
Amounts reclassified from AOCI to income 5,436 (505)
Balance at end of period 9,872 (7,132)
Defined Benefit Pension Plans    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period 137 32
Other comprehensive income (loss) before    reclassifications 0 0
Amounts reclassified from AOCI to income (141) (8)
Balance at end of period $ (4) $ 24