Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares				3 Months Ended		9 Months Ended
	Aug. 06, 2019	May 24, 2019	May 08, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Common shares repurchased (in shares)							500,989
Repurchase of common shares, weighted average price (in dollars per share)							$ 59.83
Stock dividend percent					15.00%		15.00%
Dividend declared per common share (in dollars per share)	$ 0.31	$ 0.31	$ 0.27	$ 0.31	$ 0.27	$ 0.93	$ 0.81