Business Combinations - Unaudited Pro Forma Condensed Combined Financial Information (Details) - Delta Bancshare Company $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares
Business Acquisition [Line Items]
Net interest income	$ 44,200
Provision for loan losses	2,952
Non-interest income	21,088
Non-interest expense	40,575
Income before taxes	21,761
Income tax expense	4,797
Net income	$ 16,964
Earnings per share
Basic | $ / shares	$ 0.88
Diluted | $ / shares	$ 0.88
Basic weighted average shares o/s | shares	19,295,860
Diluted weighted average shares o/s | shares	19,358,457