Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 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)	28,058	22,672	244,443	182,977
Stock repurchased (in shares)			4,922,336
Stock issued for acquisition (in shares)		3,999,623		3,999,623
Cash dividends per share (in dollars per share)	$ 0.17	$ 0.16	$ 0.34	$ 0.32