Non-controlling Interest - Distributions Paid or Payable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 17,927	$ 42,827
Tax and other distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	10,391	7,358
Dividend distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 7,536	$ 35,469