Investments - Estimated Fair Value of Contractual Maturities - Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Maturing within one year, Amortized Cost	$ 908
Maturing within one year, Amortized Cost	0	$ 3,513
Maturing after one year through five years, Amortized Cost	14,313	26,422
Maturing after five years through ten years, Amortized Cost	81,497	36,840
Maturing after ten years, Amortized Cost	330,840	253,936
Amortized Cost	1,145,141
Amortized Cost (before ASU 2016-13)		957,459
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]
Maturing within one year, Fair Value	908
Maturing within one year, Fair Value	0	3,547
Maturing after one year through five years, Fair Value	14,132	26,718
Maturing after five years through ten years, Fair Value	75,441	38,314
Maturing after ten years, Fair Value	288,539	265,792
Fair Value	1,069,434
Investment securities available for sale (before ASU 2016-13)		973,314
Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Securities not due at a single maturity date, Amortized Cost	202,882	303,912
Amortized Cost	202,882
Amortized Cost (before ASU 2016-13)		303,912
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]
Securities not due at a single maturity date, Fair Value	191,022	306,727
Fair Value	191,022
Investment securities available for sale (before ASU 2016-13)		306,727
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Securities not due at a single maturity date, Amortized Cost	514,701	332,836
Amortized Cost	514,701
Amortized Cost (before ASU 2016-13)		332,836
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]
Securities not due at a single maturity date, Fair Value	499,392	332,216
Fair Value	$ 499,392
Investment securities available for sale (before ASU 2016-13)		$ 332,216