Consolidated Statement Of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Issuance of common stock (in shares)	185,020	274,177	239,854
Issuance of deferred stock units (in shares)			63,677
Repurchases of common stock (in shares)	402,570	402,570
Special cash dividend, per share	$ 2.55	$ 2.35	$ 2.05