Summary of Significant Accounting Policies - Schedule of Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Other comprehensive income/(loss):
Other comprehensive (loss)/income before tax	$ (1,883)			$ (17,853)			$ 18,993	$ (85,369)
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income/(loss), Provision (Benefit)	(395)			(3,748)			3,989	(17,927)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gains/(losses), After Tax	2,620			(12,764)			27,484	(69,261)
Less reclassification adjustments, Provision (Benefit)	(4,108)			(1,341)			(12,480)	1,819
Other comprehensive (loss)/income net of tax	(1,488)	$ 25,511	$ (9,019)	(14,105)	$ (9,819)	$ (43,518)	15,004	(67,442)
Securities | Available-for-Sale Securities
Other comprehensive income/(loss):
Unrealized gain/(losses), Before Tax	22,081			(41,824)			46,084	(158,263)
Other comprehensive (loss)/income before tax	22,076			(41,827)			46,068	(158,273)
Other Comprehensive Income (Loss), Tax [Abstract]
Unrealized gains/(losses), Provision (Benefit)	4,638			(8,783)			9,678	(33,236)
Other comprehensive income/(loss), Provision (Benefit)	4,637			(8,784)			9,675	(33,238)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gains/(losses), After Tax	17,443			(33,041)			36,406	(125,027)
Other comprehensive (loss)/income net of tax	17,439			(33,043)			36,393	(125,035)
Securities | Held-to-Maturity Securities
Other comprehensive income/(loss):
Unrealized gain/(losses), Before Tax	(31,898)			0			(31,898)	0
Less reclassification adjustments, Before Tax	373			(622)			(730)	220
Other comprehensive (loss)/income before tax	(31,525)			(622)			(32,628)	220
Other Comprehensive Income (Loss), Tax [Abstract]
Unrealized gains/(losses), Provision (Benefit)	(6,699)			0			(6,699)	0
Less reclassification adjustments, Provision (Benefit)	79			(130)			(153)	47
Other comprehensive income/(loss), Provision (Benefit)	(6,620)			(130)			(6,852)	47
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gains/(losses), After Tax	(25,199)			0			(25,199)	0
Less reclassification adjustments, Provision (Benefit)	294			(492)			(577)	173
Other comprehensive (loss)/income net of tax	(24,905)			(492)			(25,776)	173
Securities | Net interest income | Available-for-Sale Securities
Other comprehensive income/(loss):
Less reclassification adjustments, Before Tax	0			0			0	0
Other Comprehensive Income (Loss), Tax [Abstract]
Less reclassification adjustments, Provision (Benefit)	0			0			0	0
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Less reclassification adjustments, Provision (Benefit)	0			0			0	0
Securities | Other income | Available-for-Sale Securities
Other comprehensive income/(loss):
Less reclassification adjustments, Before Tax	(5)			(3)			(16)	(10)
Other Comprehensive Income (Loss), Tax [Abstract]
Less reclassification adjustments, Provision (Benefit)	(1)			(1)			(3)	(2)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Less reclassification adjustments, Provision (Benefit)	(4)			(2)			(13)	(8)
Cash Flow Hedges
Other comprehensive income/(loss):
Unrealized gain/(losses), Before Tax	13,135			25,668			20,604	70,590
Less reclassification adjustments, Before Tax	(5,569)			(1,072)			(15,051)	2,094
Other comprehensive (loss)/income before tax	7,566			24,596			5,553	72,684
Other Comprehensive Income (Loss), Tax [Abstract]
Unrealized gains/(losses), Provision (Benefit)	2,759			5,391			4,327	14,824
Less reclassification adjustments, Provision (Benefit)	(1,171)			(225)			(3,161)	440
Other comprehensive income/(loss), Provision (Benefit)	1,588			5,166			1,166	15,264
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gains/(losses), After Tax	10,376			20,277			16,277	55,766
Less reclassification adjustments, Provision (Benefit)	(4,398)			(847)			(11,890)	1,654
Other comprehensive (loss)/income net of tax	5,978			19,430			4,387	57,420
AOCI Attributable to Parent
Other comprehensive income/(loss):
Other comprehensive (loss)/income before tax	(1,883)			(17,853)			18,993	(85,369)
Other Comprehensive Income (Loss), Tax [Abstract]
Other comprehensive income/(loss), Provision (Benefit)	(395)			(3,748)			3,989	(17,927)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive (loss)/income net of tax	$ (1,488)			$ (14,105)			$ 15,004	$ (67,442)