Partners' Equity and Equity-Based Compensation - Equity Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ (797)	$ 12,521	$ 10,977
Non-cash equity-based compensation expense	(209)	11,910	11,243
Deferred units | Awards Payable in Cash or Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	(588)	611	(266)
Performance units | Awards Payable in Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	(5,270)	5,535	5,413
Restricted units | Awards Payable in Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash equity-based compensation expense	$ 5,061	$ 6,375	$ 5,830