Non-controlling Interest - Distributions Paid or Payable (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Tax and other distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 40	$ 2,031
Dividend distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	5,526	5,275
Quarterly distribution
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 5,566	$ 7,306