Non-controlling Interest - Distributions Paid or Payable (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 6,999	$ 5,566
Tax and other distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	1,221	40
Dividend distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 5,778	$ 5,526