Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Noncontrolling Interest [Member]	Accumulated Other Comprehensive Loss
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 438,636
Beginning Balance, Issued Shares at Dec. 31, 2016	32,093,294	32,093,294
Beginning Balance, Value at Dec. 31, 2016	$ 426,896	$ 3,209	$ 0	$ 457,364	$ 11,740	$ (33,677)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	26,427			26,427	0
Net Income (Loss) Attributable to Noncontrolling Interest	196				196
Cumulative translation adjustment	2,517					2,517
Repurchase and retirement of common stock, Shares		(594,048)
Repurchase and retirement of common stock, Value	(34,167)	$ (59)	(1,366)	(32,742)
Vesting of restricted stock, Shares		24,271
Vesting of restricted stock, Value	0	$ 2	(2)
Exercise of stock options, Shares		3,500
Exercise of stock options, Value	52	$ 0	52
Share based compensation	686		686
Forfeiture of certain shares to satisfy exercise costs and the recipients income tax obligations related to stock options exercised and restricted stock vested, Shares		(2,648)
Forfeiture of certain shares to satisfy exercise costs and the recipients income tax obligations related to stock options exercised and restricted stock vested	(167)	$ 0	(167)
Recognized controlling ownership of joint venture	1,563		797	0	766
Dividends paid	$ (2,428)			(2,428)
Ending Balance, Issued Shares at Mar. 31, 2017	31,524,369	31,524,369
Ending Balance, Value at Mar. 31, 2017	$ 420,613	$ 3,152	$ 0	$ 448,621	$ 12,702	$ (31,160)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 433,315