Condensed Consolidated Statement of Stockholders' Equity - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	AOCI Attributable to Parent	Treasury Stock	Retained Earnings	Parent	Noncontrolling Interest
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2016	$ 439,256	$ 18,620	$ 126,468	$ (6,964)	$ (17,483)	$ 315,918	$ 436,559	$ 2,697
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	19,303					19,267	19,267	36
Other Comprehensive Income (Loss), Net of Tax, Total	4,460			4,460			4,460	0
Treasury Stock, Value, Acquired, Cost Method	(42,105)				(42,105)		(42,105)	0
Distributions to noncontrolling interests	(25)							(25)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	127	5	122				127	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Jun. 30, 2017	$ 421,016	$ 18,625	$ 126,590	$ (2,504)	$ (59,588)	$ 335,185	$ 418,308	$ 2,708