Deficit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			$ (49,158)	$ (48,747)
Net (loss) income	$ (609)	$ (1,779)	(5,249)	(8,745)
Other comprehensive income (loss)	184	488	370	488
Share-based compensation			1,514
Stock option exercised			66
Cash distributions to noncontrolling interests			(196)	(240)
Contributions from new members to limited liability companies				70
Balance	(52,653)	(57,174)	(52,653)	(57,174)
Additional Paid-in Capital
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			241,833	214,514
Net (loss) income
Share-based compensation			1,514
Stock option exercised			66
Balance	243,413	214,514	243,413	214,514
Accumulated Deficit
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			(283,066)	(254,418)
Net (loss) income			(5,384)	(8,965)
Balance	(288,450)	(263,383)	(288,450)	(263,383)
Accumulated Other Comprehensive Loss
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			(8,165)	(9,062)
Net (loss) income
Other comprehensive income (loss)			370	488
Balance	(7,795)	(8,574)	(7,795)	(8,574)
Noncontrolling Interests
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			240	219
Net (loss) income			135	220
Cash distributions to noncontrolling interests			(196)	(240)
Contributions from new members to limited liability companies				70
Balance	$ 179	$ 269	$ 179	$ 269