CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income/(loss)	$ 92,533	$ 118,664	$ (533,017)
Other comprehensive (loss)/income, before tax:
Changes in unrealized gains and losses on securities available-for-sale	(235,081)	(46,794)	25,726
Changes in unrealized gains and losses on cash flow hedges	(6,667)	0	0
Changes in unrealized gains and losses on pension	1,674	993	(489)
Total other comprehensive (loss)/income, before tax	(240,074)	(45,801)	25,237
Income taxes related to other comprehensive (loss)/income:
Changes in unrealized gains and losses on securities available-for-sale	60,922	11,937	(6,471)
Changes in unrealized gains and losses on cash flow hedges	1,789	0	0
Changes in unrealized gains and losses on pension	(446)	(250)	112
Total income tax benefit/(expense) related to other comprehensive income (loss)	62,265	11,687	(6,359)
Total other comprehensive (loss)/income	(177,809)	(34,114)	18,878
Total comprehensive (loss)/income	$ (85,276)	$ 84,550	$ (514,139)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Namespace Prefix:	us-gaap_
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- Definition

Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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