v3.26.1
Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance $ 6,769,871 $ 7,195,661
Reclassifications from accumulated other comprehensive income (loss) to net income    
Reclassification adjustment for gains on cash flow hedges included in net income (3,395) (5,732)
Other amounts of other comprehensive income (loss)    
Net unrealized gains (losses) on available-for-sale securities (28) 120
Unrealized gains (losses) on cash flow hedges 4,358 (7,746)
Total other comprehensive income (loss) 944 (13,552)
Ending balance 6,265,408 6,743,872
Accumulated Net Unrealized Investment Gain (Loss) [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance [1] 183,147 125,305
Other amounts of other comprehensive income (loss)    
Net unrealized gains (losses) on available-for-sale securities [1] (28) 120
Total other comprehensive income (loss) [1] (28) 120
Ending balance [1] 183,119 125,425
Accumulated Defined Benefit Plans Adjustment [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance 796 1,043
Reclassifications from accumulated other comprehensive income (loss) to net income    
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax (27) (47)
Other amounts of other comprehensive income (loss)    
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax 36 (147)
Total other comprehensive income (loss) 9 (194)
Ending balance 805 849
AOCI Attributable to Parent [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance 204,468 178,670
Reclassifications from accumulated other comprehensive income (loss) to net income    
Reclassification adjustment for gains on cash flow hedges included in net income (3,395) (5,732)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax (27) (47)
Other amounts of other comprehensive income (loss)    
Net unrealized gains (losses) on available-for-sale securities (28) 120
Unrealized gains (losses) on cash flow hedges 4,358 (7,746)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax 36 (147)
Total other comprehensive income (loss) 944 (13,552)
Ending balance 205,412 165,118
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning balance 20,525 52,322
Reclassifications from accumulated other comprehensive income (loss) to net income    
Reclassification adjustment for gains on cash flow hedges included in net income (3,395) (5,732)
Other amounts of other comprehensive income (loss)    
Unrealized gains (losses) on cash flow hedges 4,358 (7,746)
Total other comprehensive income (loss) 963 (13,478)
Ending balance $ 21,488 $ 38,844
[1]
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(1) Net unrealized gains (losses) on available-for-sale securities are net of unrealized gains and losses relating to hedged interest rate risk included in net income.