Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other comprehensive income (loss), tax	$ 3,063	$ 950	$ (635)
Cash dividend, per share (in dollars per share)	$ 1.39	$ 1.39	$ 1.21
Stock repurchase, shares (in shares)	57,554	468,400