CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Treasury stock, purchased at cost, shares	35,962	112,311
New common shares issued for exercise of stock options, shares	21,735	33,684
Cash dividend declared per common share	$ 0.025	$ 0.020
COMMON STOCK [Member]
New common shares issued for exercise of stock options, shares	21,735	33,684