Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 124,732	$ 88,018	$ 337,648	$ 284,760
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract]
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	(5,178)	90,858	47,970	49,844
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	1,992	2,147	5,978	6,329
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0	0	0	197
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax	795	(23,198)	(13,456)	(14,060)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax, Total	(2,392)	69,807	40,492	42,309
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(825)	25,609	7,707	(639)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	1,440	4,705	3,995	14,297
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	148	7,405	2,816	5,213
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	763	37,718	14,518	18,871
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	(63)	(73)	(189)	(217)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	0	0	4,770	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(4)	(7)	(12)	(21)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	17	20	(1,140)	(1,594)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total	(51)	(60)	3,429	(1,832)
Other Comprehensive Income (Loss), Net of Tax, Total	(1,680)	107,466	58,439	59,348
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 123,052	$ 195,483	$ 396,087	$ 344,108