Accounting Policies - VIE Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Current assets	$ 39,951	$ 60,730
Non-current assets	25,791	26,316
Current liabilities	18,203	24,784
Non-current liabilities	$ 25,258	25,728
Held-for-sale
Schedule of Equity Method Investments [Line Items]
Assets held for sale		21,060
Liabilities held for sale		$ 6,961