Non-controlling Interest - Distributions Paid or Payable (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 19, 2020	Dec. 31, 2019	Dec. 31, 2018
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders		$ 15,430	$ 14,559
Tax and other distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders		4,880	4,511
Dividend distributions
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders		$ 10,550	$ 10,048
Subsequent Event | Quarterly distribution
Dividends Payable [Line Items]
Distributions paid or payable to or on behalf of non-controlling unitholders	$ 2,800