Accounting Policies - VIE Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Current assets	$ 32,544	$ 60,730
Non-current assets	26,355	26,316
Current liabilities	9,187	24,784
Non-current liabilities	$ 31,832	25,728
Held-for-sale
Schedule of Equity Method Investments [Line Items]
Assets held for sale		21,060
Liabilities held for sale		$ 6,961