Non-controlling Interest - Distributions Paid or Payable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 2,889	$ 2,777
Tax and other distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders		14
Dividend distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 2,889	$ 2,763