Investment Securities - Held-to-maturity Securities by Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	$ 7,130
Debt securities, maturing 1 to 5 years, amortized cost	36,411
Debt securities, maturing 5 to 10 years, amortized cost	115,154
Debt securities, maturing over 10 years, amortized cost	535,618
Amortized Cost	694,313	$ 560,453
Debt securities, maturing within 1 year, fair value	7,001
Debt securities, maturing 1 to 5 years, fair value	34,679
Debt securities, maturing 5 to 10 years, fair value	110,005
Debt securities, maturing over 10 years, fair value	472,751
Debt securities, held-to-maturity, fair value	$ 624,436	478,509
Held-to-maturity securities, maturing within 1 year, weighted average yield	2.01%
Held-to-maturity securities, maturing 1 to 5 years, weighted average yield	2.01%
Held-to-maturity securities, maturing 6 to 10 years, weighted average yield	4.29%
Held-to-maturity securities, maturing over 10 years, weighted average yield	3.45%
Held-to-maturity securities, total weighted average yield	3.50%
U.S. government sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	$ 2,126
Debt securities, maturing 1 to 5 years, amortized cost	24,178
Debt securities, maturing 5 to 10 years, amortized cost	71,008
Debt securities, maturing over 10 years, amortized cost	96,872
Amortized Cost	194,184	132,366
Debt securities, maturing within 1 year, fair value	2,102
Debt securities, maturing 1 to 5 years, fair value	23,398
Debt securities, maturing 5 to 10 years, fair value	70,844
Debt securities, maturing over 10 years, fair value	90,102
Debt securities, held-to-maturity, fair value	186,446	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	5,214
Debt securities, maturing 5 to 10 years, amortized cost	9,402
Debt securities, maturing over 10 years, amortized cost	130,469
Amortized Cost	145,085	145,263
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	4,944
Debt securities, maturing 5 to 10 years, fair value	8,165
Debt securities, maturing over 10 years, fair value	101,083
Debt securities, held-to-maturity, fair value	114,192	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	890
Debt securities, maturing 5 to 10 years, amortized cost	0
Debt securities, maturing over 10 years, amortized cost	244,404
Amortized Cost	245,294	176,215
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	866
Debt securities, maturing 5 to 10 years, fair value	0
Debt securities, maturing over 10 years, fair value	229,511
Debt securities, held-to-maturity, fair value	230,377	157,998
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	5,004
Debt securities, maturing 1 to 5 years, amortized cost	6,129
Debt securities, maturing 5 to 10 years, amortized cost	34,744
Debt securities, maturing over 10 years, amortized cost	63,873
Amortized Cost	109,750	106,609
Debt securities, maturing within 1 year, fair value	4,899
Debt securities, maturing 1 to 5 years, fair value	5,471
Debt securities, maturing 5 to 10 years, fair value	30,996
Debt securities, maturing over 10 years, fair value	52,055
Debt securities, held-to-maturity, fair value	$ 93,421	$ 88,715