Accounting Policies - VIEs, Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Current assets	$ 60,730	$ 57,046
Non-current assets	26,316	43,165
Current liabilities	24,784	22,525
Non-current liabilities	25,728	$ 36,155
Held-for-sale Assets
Variable Interest Entity [Line Items]
Total assets held for sale	21,060
Total liabilities held for sale	$ 6,961