Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends per share (in usd per share)	$ 0.60	$ 0.51	$ 0.42
Issuance of stock including compensation expense (in shares)	15,645	38,764	4,421
Issuance of treasury stock, shares (in shares)			56,885
Issuance of stock, compensation expense	$ 1,586	$ 1,493	$ 1,386
Acquisition of treasury stock (in shares)	11,699	8,214
Shares of common stock issued for acquisition (in shares)	1,765,704	1,052,635