Unaudited Condensed Consolidated Statement of Equity - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Total	Stockholders' Equity [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2014	$ 150,426	$ 148,084	$ 164	$ 143,475	$ 4,445	$ 2,342
Beginning Balance, Shares at Dec. 31, 2014	16,448,750
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 9,165	9,462			9,462	(297)
Noncontrolling interest contribution	1,301					1,301
Noncontrolling interest distribution	(822)					(822)
Stock-based compensation expense	2,725	2,725		2,725
Minimum tax withholding paid on behalf of employees for stock awards	(248)	(248)		(248)
Shares issued through stock plans	0	0	$ (1)	(1)
Shares issued through stock plans			67,796
Ending balance at Sep. 30, 2015	$ 162,547	$ 160,023	$ 165	$ 145,951	$ 13,907	$ 2,524
Ending balance, shares at Sep. 30, 2015			16,516,546