Non-controlling Interest - Distributions Paid or Payable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Tax and other distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 14	$ 55
Dividend distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	2,763	2,638
Quarterly distribution
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 2,777	$ 2,693