Investment Securities - Amortized Cost and Fair Value of Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Sep. 01, 2022
Amortized Cost
Due in one year or less	$ 1,665
Due after one year through five years	14,196
Due after five years through ten years	96,094
Due after ten years	102,817
Total amortized cost	214,772
Mortgage-backed securities	262,298
Amortized Cost	477,070	$ 490,206
Fair Value
Due in one year or less	1,648
Due after one year through five years	13,020
Due after five years through ten years	81,109
Due after ten years	91,581
Total fair value	187,358
Mortgage-backed securities	233,890
Fair value	421,248	432,553
Amortized Cost
Due in one year or less	0
Due after one year through five years	89,427
Due after five years through ten years	71,551
Due after ten years	84,228
Total amortized cost	245,206
Mortgage-backed securities	208,706
Amortized Cost	453,912	465,858
Fair Value
Due in one year or less	0
Due after one year through five years	84,806
Due after five years through ten years	64,054
Due after ten years	74,539
Total fair value	223,399
Mortgage-backed securities	181,307
Fair value	$ 404,706	$ 411,264	$ 477,000