Borrowed Funds - Schedule of Long-Term Borrowings (Details) - Long-term borrowings - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
FHLB advances, net	$ 789,033	$ 1,592,252
Subordinated debt, net	634,643	403,413
Securities sold under agreements to repurchase	0	300,000
Total long-term borrowings	1,423,676	2,295,665
Unamortized prepayment penalties and other purchase accounting adjustments	1,000	2,600
Deferred issuance costs	$ 5,800	$ 2,700