Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			$ (48,747)	$ 23,020
Net (loss) income	$ (8,547)	$ (10,185)	(17,292)	(52,447)
Other comprehensive income	244		732
Cash distributions to noncontrolling interests			(360)	(436)
Contributions from new members to limited liability companies			70
Purchases of noncontrolling interests				(46)
Balance	(65,597)	(29,909)	(65,597)	(29,909)
Additional Paid-in Capital
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			$ 214,514	214,505
Net (loss) income
Purchases of noncontrolling interests				(11)
Balance	214,514	214,494	$ 214,514	214,494
Accumulated Deficit
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			(254,418)	(187,901)
Net (loss) income			(17,633)	(52,811)
Balance	(272,051)	(240,712)	(272,051)	(240,712)
Accumulated Other Comprehensive Loss
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			(9,062)	$ (3,884)
Net (loss) income
Other comprehensive income			732
Balance	(8,330)	(3,884)	(8,330)	$ (3,884)
Non controlling Interests
Changes in shareholders equity that are attributable to shareholders and noncontrolling interests
Balance			219	300
Net (loss) income			341	364
Cash distributions to noncontrolling interests			(360)	(436)
Contributions from new members to limited liability companies			70
Purchases of noncontrolling interests				(35)
Balance	$ 270	$ 193	$ 270	$ 193