Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Net income related to redeemable noncontrolling interests	$ 958	$ 1,210	$ 1,233
Mandatorily redeemable noncontrolling interests	1,447	1,625	2,033
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Mandatorily Redeemable Noncontrolling Interest	$ (440)	$ (469)	$ (44)