Unaudited Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Accounting Standards Update 2016-13	Accumulated other comprehensive (loss) income	Noncontrolling Interests	General Partner	General Partner Accounting Standards Update 2016-13	Preferred Class B and Class C Preferred Units	Preferred Class B and Class C Preferred Units Preferred Class B and Class C Preferred Units	Limited Partner	Limited Partner Accounting Standards Update 2016-13	Limited Partner Common units
Beginning Balance (in units) at Mar. 31, 2020								14,385,642			128,771,715
Beginning Balance at Mar. 31, 2020	$ 1,735,690		$ (385)	$ 72,954	$ (51,390)		$ 348,359		$ 1,366,152
Increase (Decrease) in Partnership Capital
Distributions to general and common unit partners and preferred unitholders	(47,678)				(26)				(47,652)
Distributions to noncontrolling interest owners	(2,257)			(2,257)
Equity issued pursuant to incentive compensation plan (Note 8)	1,349								1,349
Net (loss) income	(35,252)			51	(57)				(35,246)
Other comprehensive loss	44		44
Ending Balance (in units) at Jun. 30, 2020								14,385,642			128,771,715
Ending Balance at Jun. 30, 2020	1,650,783		(341)	70,748	(51,474)		348,359		1,283,491
Beginning Balance (in units) at Mar. 31, 2020								14,385,642			128,771,715
Beginning Balance at Mar. 31, 2020	1,735,690		(385)	72,954	(51,390)		348,359		1,366,152
Increase (Decrease) in Partnership Capital
Other comprehensive loss	119
Ending Balance (in units) at Dec. 31, 2020								14,385,642			129,168,035
Ending Balance at Dec. 31, 2020	1,192,573		(266)	69,442	(51,935)		348,359		826,973
Increase (Decrease) in Partnership Capital
Cumulative effect adjustment for adoption of ASU 2016-13		$ (1,113)				$ (1)				$ (1,112)
Beginning Balance (in units) at Jun. 30, 2020								14,385,642			128,771,715
Beginning Balance at Jun. 30, 2020	1,650,783		(341)	70,748	(51,474)		348,359		1,283,491
Increase (Decrease) in Partnership Capital
Distributions to general and common unit partners and preferred unitholders	(47,834)				(26)				(47,808)
Distributions to noncontrolling interest owners	(598)			(598)
Equity issued pursuant to incentive compensation plan (Note 8)	1,308								1,308
Net (loss) income	5,835			168	(18)				5,685
Other comprehensive loss	34		34
Ending Balance (in units) at Sep. 30, 2020								14,385,642			128,771,715
Ending Balance at Sep. 30, 2020	1,609,528		(307)	70,318	(51,518)		348,359		1,242,676
Increase (Decrease) in Partnership Capital
Distributions to general and common unit partners and preferred unitholders	(36,660)				(13)				(36,647)
Distributions to noncontrolling interest owners	(842)			(842)
Common unit repurchases and cancellations	(134)								(134)
Common unit repurchases and cancellations (in units)											(50,155)
Equity issued pursuant to incentive compensation plan (in units)											446,475
Equity issued pursuant to incentive compensation plan (Note 8)	1,170								1,170
Net (loss) income	(380,530)			(34)	(404)				(380,092)
Other comprehensive loss	41		41
Ending Balance (in units) at Dec. 31, 2020								14,385,642			129,168,035
Ending Balance at Dec. 31, 2020	1,192,573		(266)	69,442	(51,935)		348,359		826,973
Beginning Balance (in units) at Mar. 31, 2021								14,385,642			129,593,939
Beginning Balance at Mar. 31, 2021	948,159		(266)	69,471	(52,189)		348,359		582,784
Increase (Decrease) in Partnership Capital
Distributions to noncontrolling interest owners	(444)			(444)
Sawtooth joint venture disposition (Note 15)	(51,097)			(51,097)
Equity issued pursuant to incentive compensation plan (Note 8)	960								960
Net (loss) income	(134,502)			438	(159)				(134,781)
Other comprehensive loss	8		8
Ending Balance (in units) at Jun. 30, 2021								14,385,642			129,593,939
Ending Balance at Jun. 30, 2021	763,084		(258)	18,368	(52,348)		348,359		448,963
Beginning Balance (in units) at Mar. 31, 2021								14,385,642			129,593,939
Beginning Balance at Mar. 31, 2021	948,159		(266)	69,471	(52,189)		348,359		582,784
Increase (Decrease) in Partnership Capital
Other comprehensive loss	(48)
Ending Balance (in units) at Dec. 31, 2021								14,385,642			129,984,138
Ending Balance at Dec. 31, 2021	743,715		(314)	17,734	(52,422)		348,359		430,358
Beginning Balance (in units) at Jun. 30, 2021								14,385,642			129,593,939
Beginning Balance at Jun. 30, 2021	763,084		(258)	18,368	(52,348)		348,359		448,963
Increase (Decrease) in Partnership Capital
Distributions to noncontrolling interest owners	(513)			(513)
Equity issued pursuant to incentive compensation plan (Note 8)	1,048								1,048
Net (loss) income	(1,207)			330	(27)				(1,510)
Other comprehensive loss	(52)		(52)
Ending Balance (in units) at Sep. 30, 2021								14,385,642			129,593,939
Ending Balance at Sep. 30, 2021	762,360		(310)	18,185	(52,375)		348,359		448,501
Increase (Decrease) in Partnership Capital
Distributions to noncontrolling interest owners	(388)			(388)
Common unit repurchases and cancellations	(20)								(20)
Common unit repurchases and cancellations (in units)											(8,901)
Equity issued pursuant to incentive compensation plan (in units)											399,100
Equity issued pursuant to incentive compensation plan (Note 8)	749								749
Net (loss) income	(18,982)			(63)	(47)				(18,872)
Other comprehensive loss	(4)		(4)
Ending Balance (in units) at Dec. 31, 2021								14,385,642			129,984,138
Ending Balance at Dec. 31, 2021	$ 743,715		$ (314)	$ 17,734	$ (52,422)		$ 348,359		$ 430,358