Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Consolidated Statements of Changes in Shareholders' Equity (Unaudited) [Abstract]
Cash dividend declared (in dollars per share)	$ 0.068125	$ 0.068125	$ 0.068125	$ 0.068125
Stock option exercises (in shares)				5,100
Purchase of treasury stock (in shares)		489,000		4,131
Sale of treasury stock (in shares)			76,443	86,297