Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement Of Stockholders Equity [Abstract]
Exercise of stock options and warrants, shares	41,621	35,952
Purchase of treasury stock	27,285	31,404
Sale of treasury shares	52,925	6,971
Dividends declared, per share	$ 0.40	$ 0.36