CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (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]
Issuance of common stock (in shares)	13,120	1,468	105,542	87,959
Issuance of common stock purchased under the employee stock purchase plan (in shares)	1,861	1,786	5,430	5,821
Forfeiture of common stock (in shares)	3,188	134	4,211	5,255
Cash dividend (in dollars per share)			$ 0.89	$ 0.82
Purchase of common stock (in shares)	29,807	8,209	112,407	83,606