Investment Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 8,283
Due after one year through five years	82,106
Due after five years through ten years	67,161
Due after ten years	130,767
Amortized cost	1,267,715
Fair Value
Due in one year or less	8,306
Due after one year through five years	80,881
Due after five years through ten years	65,321
Due after ten years	117,148
Fair Value	1,187,588	$ 894,335
Amortized Cost
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	83,210
Due after ten years	67,750
Investment securities held to maturity, at amortized cost, net (fair value of $559,312 and $376,331, respectively)	615,653	383,393
Fair Value
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	72,516
Due after ten years	55,028
Total investment securities	559,312	$ 376,331
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	288,317
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	271,656
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date	150,960
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value	127,544
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	979,398
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	915,932
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date	464,693
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value	$ 431,768