Consolidated Statement Of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Amounts attributable to redeemable noncontrolling interest	$ 2,713	$ 3,423	$ 3,452