Deficit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			$ (59,485)	$ (49,158)
Net (loss) income	$ (2,293)	$ (609)	(4,183)	(5,249)
Other comprehensive income	192	184	371	370
Contribution from Parent			1,900
Share-based compensation			1,551	1,514
Stock option exercised			29	66
Cash distributions to noncontrolling interests			(133)	(196)
Balance	(59,950)	(52,653)	(59,950)	(52,653)
Additional Paid-in Capital
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			244,986	241,833
Net (loss) income
Contribution from Parent			1,900
Share-based compensation			1,551	1,514
Stock option exercised			29	66
Balance	248,466	243,413	248,466	243,413
Accumulated Deficit
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			(296,826)	(283,066)
Net (loss) income			(4,353)	(5,384)
Balance	(301,179)	(288,450)	(301,179)	(288,450)
Accumulated Other Comprehensive Loss
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			(7,826)	(8,165)
Net (loss) income
Other comprehensive income			371	370
Balance	(7,455)	(7,795)	(7,455)	(7,795)
Noncontrolling Interests
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			181	240
Net (loss) income			170	135
Cash distributions to noncontrolling interests			(133)	(196)
Balance	$ 218	$ 179	$ 218	$ 179