Consolidated Statement of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Common Stock [Member]
Cash dividends per share	$ 0.35	$ 0.35	$ 0.34	$ 0.34
Grant of restricted stock, shares		175,495		126,427
Forfeiture of restricted stock, shares		946	2,539
Common stock options exercised, shares	300	14,694	14,144	33,816
Acquisition, Shares	28,031,501
Treasury Stock [Member]
Purchase of treasury stock, shares	6	19,314	166,604	365,702