Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Stockholders' Equity of the Company Common Stock [Member]	Stockholders' Equity of the Company Treasury Stock [Member]	Stockholders' Equity of the Company Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss)	Stockholders' Equity of the Company Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Beginning balance, value at Dec. 31, 2015				$ (101,365)
Net income							$ 11,905
Dividends distributed to noncontrolling interest							(900)
Foreign currency translation adjustments							$ 9,956
Ending balance, value at Mar. 31, 2016				(85,815)
Preferred stock beginning balance, share at Dec. 31, 2016							0
Common stock beginning balance, share at Dec. 31, 2016	46,114,000						46,113,693
Beginning balance, value at Dec. 31, 2016	$ 462	$ (603,262)	$ 348,739	(126,964)	$ 735,939	$ 6,981	$ 361,895
Net income					19,245	922	20,167
Dividends to shareholders					(10,069)		(10,069)
Dividends distributed to noncontrolling interest						(945)	(945)
Foreign currency translation adjustments				6,136		92	6,228
Derivatives valuation, net of tax				8,184			8,184
Vesting of restricted stock units, share	42,000
Vesting of restricted stock units, value		683	(1,370)				(687)
Equity-based compensation expense			2,319			(291)	2,028
Purchases of common stock, share	(387,000)
Purchases of common stock, value	$ (4)	(11,654)					(11,658)
Other, net of tax				129			$ 129
Preferred stock ending balance, share at Mar. 31, 2017							0
Common stock ending balance, share at Mar. 31, 2017	45,769,000						45,768,986
Ending balance, value at Mar. 31, 2017	$ 458	$ (614,233)	$ 349,688	$ (112,515)	$ 745,115	$ 6,759	$ 375,272