Reconciliation of Equity (Net Assets) Attributable to the Non-controlling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reconciliation of equity (net assets) attributable to the non-controlling interests
Non-controlling interests at beginning of period			$ 7,309
Less: Net loss attributable to the non-controlling interests	$ 423	$ 228	880	$ 391
Non-controlling interests at end of period	6,429		6,429
Variable Interest Entity [Member]
Reconciliation of equity (net assets) attributable to the non-controlling interests
Non-controlling interests at beginning of period			7,309	8,310
Less: Net loss attributable to the non-controlling interests			880	391
Non-controlling interests at end of period	$ 6,429	$ 7,919	$ 6,429	$ 7,919