Unaudited Condensed Consolidated Statement of Equity - 6 months ended Jun. 30, 2016 - 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, 2015	$ 221,697	$ 220,775	$ 205	$ 194,437	$ 26,133	$ 922
Beginning Balance, Shares at Dec. 31, 2015	20,543,130		20,543,130
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 1,575	1,695			1,695	(120)
Noncontrolling interest distribution	(725)					725
Stock-based compensation expense	1,742	1,742		1,742
Shares net settled with the Company to satisfy employee personal income tax liabilities resulting from share based compensation plans	(647)	(647)		(647)
Tax valuation adjustment from stock-based compensation	(97)	(97)		(97)
Shares issued through stock plans	0	0	$ 2	(2)
Shares issued through stock plans, shares			168,822
Ending balance at Jun. 30, 2016	$ 223,545	$ 223,468	$ 207	$ 195,433	$ 27,828	$ 77
Ending Balance, Shares at Jun. 30, 2016	20,711,952		20,711,952