Investment Securities - Held-to-maturity Securities by Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	$ 9,629
Debt securities, maturing 1 to 5 years, amortized cost	37,151
Debt securities, maturing 5 to 10 years, amortized cost	112,150
Debt securities, maturing over 10 years, amortized cost	515,236
Amortized Cost	674,166	$ 560,453
Debt securities, maturing within 1 year, fair value	9,467
Debt securities, maturing 1 to 5 years, fair value	35,253
Debt securities, maturing 5 to 10 years, fair value	105,178
Debt securities, maturing over 10 years, fair value	444,370
Debt securities, held-to-maturity, fair value	$ 594,268	478,509
Held-to-maturity securities, maturing within 1 year, weighted average yield	2.06%
Held-to-maturity securities, maturing 1 to 5 years, weighted average yield	1.83%
Held-to-maturity securities, maturing 6 to 10 years, weighted average yield	4.16%
Held-to-maturity securities, maturing over 10 years, weighted average yield	3.36%
Held-to-maturity securities, total weighted average yield	3.39%
U.S. government sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	$ 4,627
Debt securities, maturing 1 to 5 years, amortized cost	21,669
Debt securities, maturing 5 to 10 years, amortized cost	67,019
Debt securities, maturing over 10 years, amortized cost	82,712
Amortized Cost	176,027	132,366
Debt securities, maturing within 1 year, fair value	4,559
Debt securities, maturing 1 to 5 years, fair value	20,797
Debt securities, maturing 5 to 10 years, fair value	66,047
Debt securities, maturing over 10 years, fair value	74,831
Debt securities, held-to-maturity, fair value	166,234	123,020
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	5,216
Debt securities, maturing 5 to 10 years, amortized cost	9,397
Debt securities, maturing over 10 years, amortized cost	130,296
Amortized Cost	144,909	145,263
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	5,217
Debt securities, maturing 5 to 10 years, fair value	8,033
Debt securities, maturing over 10 years, fair value	99,551
Debt securities, held-to-maturity, fair value	112,801	108,776
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	772
Debt securities, maturing 5 to 10 years, amortized cost	4,558
Debt securities, maturing over 10 years, amortized cost	238,477
Amortized Cost	243,807	176,215
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	747
Debt securities, maturing 5 to 10 years, fair value	3,896
Debt securities, maturing over 10 years, fair value	219,312
Debt securities, held-to-maturity, fair value	223,955	157,998
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	5,002
Debt securities, maturing 1 to 5 years, amortized cost	9,494
Debt securities, maturing 5 to 10 years, amortized cost	31,176
Debt securities, maturing over 10 years, amortized cost	63,751
Amortized Cost	109,423	106,609
Debt securities, maturing within 1 year, fair value	4,908
Debt securities, maturing 1 to 5 years, fair value	8,492
Debt securities, maturing 5 to 10 years, fair value	27,202
Debt securities, maturing over 10 years, fair value	50,676
Debt securities, held-to-maturity, fair value	$ 91,278	$ 88,715