Condensed Consolidated Statement of Stockholders' Equity - 3 months ended Mar. 31, 2018 - 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, 2017	$ 434,243	$ 18,625	$ 124,538	$ (4,598)	$ (63,404)	$ 356,383	$ 431,544	$ 2,699
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	6,977					6,961	6,961	16
Other Comprehensive Income (Loss), Net of Tax	(4,037)			(4,037)			(4,037)	0
Treasury Stock, Value, Acquired, Cost Method	(2,642)				(2,642)		(2,642)	0
Sharebased Compensation Effect On Stockholders Equity	286		236		50		286	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2018	434,414	$ 18,625	$ 124,774	(8,985)	$ (65,996)	363,378	431,796	2,618
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (413)			$ (350)		$ 34	$ (316)	$ (97)