Borrowed Funds - Schedule of Long-Term Borrowings (Details) - Long-term borrowings - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
FHLB advances, net	$ 1,688,260	$ 788,419
Subordinated debt, net	630,034	754,639
Total long-term borrowings	2,318,294	1,543,058
Unamortized prepayment penalties and other purchase accounting adjustments	260	419
Deferred issuance costs	$ 5,600	$ 6,900