Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cash dividend declared, per share (in dollars per share)	$ 0.15	$ 0.14	$ 0.34	$ 0.33
Retained Earnings [Member]
Cash dividend declared, per share (in dollars per share)	$ 0.15	$ 0.34	$ 0.14	$ 0.33
Treasury Stock [Member]
Treasury stock purchased, shares (in shares)	8,314	4,602	18,038	150,920