Unaudited Condensed Consolidated Statements of Changes in Partners' Capital - USD ($) $ in Thousands	Total	Common units	Warrants
Beginning balance Partners' capital at Dec. 31, 2019	$ 1,180,598	$ 1,166,619	$ 13,979
Increase (Decrease) in Partners' Capital
Vesting of phantom units	1,065	1,065	0
Distributions and DERs	(50,755)	(50,755)	0
Issuance of common units under the DRIP	301	301	0
Unit-based compensation for equity classified awards	55	55	0
Net loss attributable to common unitholders’ interests	(614,648)	(614,648)	0
Ending balance Partners' capital at Mar. 31, 2020	516,616	502,637	13,979
Beginning balance Partners' capital at Dec. 31, 2020	337,655	323,676	13,979
Increase (Decrease) in Partners' Capital
Vesting of phantom units	391	391	0
Distributions and DERs	(50,931)	(50,931)	0
Issuance of common units under the DRIP	463	463	0
Unit-based compensation for equity classified awards	52	52	0
Net loss attributable to common unitholders’ interests	(11,816)	(11,816)	0
Ending balance Partners' capital at Mar. 31, 2021	$ 275,814	$ 261,835	$ 13,979