Goodwill and Intangible Assets - Schedule of Reconciliation of Purchase Price Paid for Acquisition and Goodwill Recorded (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022
Less purchase accounting adjustments:
Goodwill	$ 140,412	$ 140,412
Delta Bancshares Company
Goodwill [Line Items]
Unallocated purchase price	29,791
Less purchase accounting adjustments:
Fair value of securities	(2,836)
Fair value of loans, net	(3,399)
Fair value of premises and equipment	3,508
Fair value of time deposits	(1,759)
Fair value of FHLB advances	(75)
Core deposit intangible	5,920
Other assets	(570)
Other liabilities	444
Goodwill, purchase accounting adjustments	1,233
Goodwill	$ 28,558		$ 28,200	$ 28,600