Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Purchase of treasury stock, shares (in shares)			800		7,729	895
Dividends paid, per share (in dollars per share)	$ 0.24	$ 0.24	$ 0.24	$ 0.22	$ 0.22	$ 0.22
Stock issuance cost					$ 515