Unitholders' Equity - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Total Unitholders’ Accumulated Other Comprehensive Loss, net of taxes
Class of Stock [Line Items]
Balance as of period date	$ (5,106)	$ (5,106)	$ (6,175)	$ (6,175)
Post-Retirement Benefit Plans, net of taxes
Class of Stock [Line Items]
Balance as of period date	$ (5,106)	$ (5,106)	$ (6,175)	$ (6,175)