Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Stock issued for employee stock purchase plan, shares (in shares)			43,681	60,413
Stock issued for compensation plans, shares (in shares)	29,392	23,199	273,835	206,176
Stock repurchased (in shares)			4,922,336
Stock issued for acquisition (in shares)				3,999,623
Cash dividends per share (in dollars per share)	$ 0.17	$ 0.16	$ 0.51	$ 0.48