Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Apr. 22, 2021	Mar. 31, 2021	Mar. 31, 2020	Apr. 21, 2021
Subsequent Event [Line Items]
Dividends declared per share (in dollars per share)		$ 0.1025	$ 0.10
Subsequent Event
Subsequent Event [Line Items]
Stock price (in dollars per share)				$ 15.00
Dividends declared per share (in dollars per share)	$ 0.1025
Subsequent Event | SouthCrest Financial Group, Inc.
Subsequent Event [Line Items]
Percentage of business acquired	100.00%
Value of combined stock-and-cash transaction	$ 84.0
Assets acquired	2,400.0
Loans acquired	1,400.0
Deposits acquired	2,000.0
Tangible common equity acquired	$ 165.8
Cash paid in exchange for each share (in dollars per share)	$ 10.45
Shares exchanged for each share (in shares)	0.7318
Percentage of shares that will be converted to cash consideration	27.50%
Percentage of shares that will be converted to common stock	72.50%
Merger consideration price (in dollars per share)	$ 10.83