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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, net of tax	$ 1,201,948	$ 1,161,957	$ 1,145,977	$ 1,319,112
Unrealized/Unrecognized gains (losses) on debt securities
Unrealized holding gains (losses) on debt securities available for sale, net of tax	(26,950)	(69,306)	(16,872)	(211,988)
Unrealized losses on debt securities transferred to held to maturity from available for sale, net of tax	0	0	0	(34,644)
Amounts reclassified from AOCI, net of tax	(24)	(53)	(148)	20
Amortization of unrealized losses on securities transferred to held to maturity, net of tax	(1,056)	(1,291)	(3,379)	(3,500)
Unrealized gains (losses) on cash flow hedges
Unrealized holding gains (losses) on cash flow hedges, net of tax	(5,577)	(10,192)	(8,563)	(21,587)
Amounts reclassified from AOCI, net of tax	(1,638)	(266)	(4,456)	498
Ending balance, net of tax	1,190,158	1,106,588	1,190,158	1,106,588
AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, net of tax	(260,921)	(211,107)	(273,278)	(23,758)
Unrealized gains (losses) on cash flow hedges
Accumulated other comprehensive income (loss) ending balance period, before tax	(406,639)	(404,213)	(406,639)	(404,213)
Accumulated other comprehensive income (loss) ending balance period, tax effect	115,909	115,218	115,909	115,218
Ending balance, net of tax	(290,730)	(288,995)	(290,730)	(288,995)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) beginning balance period, before tax	(335,359)	(277,310)	(352,878)	(32,272)
Accumulated other comprehensive income (loss) beginning balance period, tax effect	95,591	79,047	100,585	9,199
Beginning balance, net of tax	(239,768)	(198,263)	(252,293)	(23,073)
Unrealized/Unrecognized gains (losses) on debt securities
Unrealized holding gains (losses) on debt securities available for sale, before tax	(37,696)	(96,937)	(23,600)	(296,507)
Unrealized holding gains (losses) on debt securities available for sale, tax effect	10,746	27,631	6,728	84,519
Unrealized holding gains (losses) on debt securities available for sale, net of tax	(26,950)	(69,306)	(16,872)	(211,988)
Unrealized losses on debt securities transferred to held to maturity from available for sale, before tax			0	(48,456)
Unrealized losses on debt securities transferred to held to maturity from available for sale, tax effect	0	0	0	13,812
Unrealized losses on debt securities transferred to held to maturity from available for sale, net of tax			0	(34,644)
Amounts reclassified from AOCI, before tax	33	74	207	(28)
Reclassification adjustment for realized (gains) losses on debt securities available for sale included in net income, tax expense (benefit)	(9)	(21)	(59)	8
Amounts reclassified from AOCI, net of tax	24	53	148	(20)
Amortization of unrealized losses on securities transferred to held to maturity, before tax	1,476	1,806	4,725	4,896
Amortization of unrealized losses on securities transferred to held to maturity, tax effect	420	515	1,346	1,396
Amortization of unrealized losses on securities transferred to held to maturity, net of tax	1,056	1,291	3,379	3,500
Unrealized gains (losses) on cash flow hedges
Accumulated other comprehensive income (loss) ending balance period, before tax	(371,546)	(372,367)	(371,546)	(372,367)
Accumulated other comprehensive income (loss) ending balance period, tax effect	105,908	106,142	105,908	106,142
Ending balance, net of tax	(265,638)	(266,225)	(265,638)	(266,225)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) beginning balance period, before tax	(29,586)	(17,963)	(29,350)	(958)
Accumulated other comprehensive income (loss) beginning balance period, tax effect	8,433	5,119	8,365	273
Beginning balance, net of tax	(21,153)	(12,844)	(20,985)	(685)
Unrealized gains (losses) on cash flow hedges
Unrealized holding gains (losses) on cash flow hedges, before tax	(7,797)	(14,253)	(11,975)	(30,191)
Unrealized holding gains (losses) on cash flow hedges, tax effect	2,220	4,061	3,412	8,604
Unrealized holding gains (losses) on cash flow hedges, net of tax	(5,577)	(10,192)	(8,563)	(21,587)
(Gain) loss reclassified from OCI to interest expense, net of tax	2,290	370	6,232	(697)
Amounts reclassified from AOCI, tax effect	(652)	(104)	(1,776)	199
Amounts reclassified from AOCI, net of tax	1,638	266	4,456	(498)
Accumulated other comprehensive income (loss) ending balance period, before tax	(35,093)	(31,846)	(35,093)	(31,846)
Accumulated other comprehensive income (loss) ending balance period, tax effect	10,001	9,076	10,001	9,076
Ending balance, net of tax	$ (25,092)	$ (22,770)	$ (25,092)	$ (22,770)

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