Equity - Class D Preferred Units (Details) $ / shares in Units, $ in Thousands									3 Months Ended		4 Months Ended	12 Months Ended	15 Months Ended
	Feb. 12, 2021 USD ($) $ / shares	Nov. 13, 2020 USD ($) $ / shares	Aug. 14, 2020 USD ($) $ / shares	May 15, 2020 USD ($) $ / shares	Feb. 14, 2020 USD ($) $ / shares	Nov. 14, 2019 USD ($) $ / shares	Oct. 31, 2019 USD ($) $ / shares shares	Jul. 02, 2019 USD ($) $ / shares shares	Mar. 31, 2022 $ / shares	Feb. 12, 2021 $ / shares	Oct. 31, 2019 USD ($) $ / shares shares	Mar. 31, 2020 USD ($)	Mar. 31, 2022 USD ($) $ / shares
Class of Stock
Issuance of warrants, net of offering costs (Note 9)												$ 52,742
Class D Preferred Units First Issuance
Class of Stock
Temporary equity, issued (in units) | shares								400,000
Preferred units, authorized amount								$ 400,000
Proceeds from sale of preferred units and warrants, net of offering costs								385,400
Closing fee payable to affiliates of the purchaser								14,600
Allocation of net proceeds to Class D Preferred Units								$ 343,700
Class D Preferred Units Second Issuance
Class of Stock
Temporary equity, issued (in units) | shares							200,000				200,000
Preferred units, authorized amount							$ 200,000				$ 200,000
Proceeds from sale of preferred units and warrants, net of offering costs							194,700
Closing fee payable to affiliates of the purchaser							5,300				$ 5,300
Allocation of net proceeds to Class D Preferred Units							$ 183,600
Class D Preferred Units
Class of Stock
Preferred units, dividend payment terms								The holders of the Class D Preferred Units are entitled to receive a cumulative, quarterly distribution in arrears on each Class D Preferred Unit then held at an annual rate of (i) 9.00% per annum for all periods during which the Class D Preferred Units are outstanding beginning on July 2, 2019 (the “Closing Date”) and ending on the date and including the last day of the eleventh full quarter following Closing Date, (ii) 10.00% per annum for all periods during which the Class D Preferred Units are outstanding beginning on and including the first day of the twelfth full quarter following the Closing Date and ending on the last day of the nineteenth full quarter following the Closing Date, and (iii) thereafter, 10.00% per annum or, at the purchasers’ election from time to time, a floating rate equal to the applicable three-month LIBOR (or alternative rate as determined in accordance with the partnership agreement), plus 7.00% per annum.
Distributions made to preferred unitholders distributions declared per unit | $ / shares	$ 26.01	$ 26.01	$ 11.25	$ 11.25	$ 11.25	$ 11.25				$ 26.01
Amount paid to preferred unitholders	$ 15,608	$ 15,608	$ 6,946	$ 6,868	$ 6,075	$ 4,450
Adjusted total leverage ratio default rate										0.010
Dividends paid-in-kind			$ 6,900									$ 17,400
Percent of dividend not paid in cash			50.00%									50.00%
Class D Preferred Units
Class of Stock
Preferred units, dividend payment terms								The current distribution rate for the Class D Preferred Units is 9.00% per year per unit (equal to $90.00 per every $1,000 in unit value per year), plus an additional 1.5% rate increase due to us exceeding the adjusted total leverage ratio and due to a Class D distribution payment default, as defined within the Amended and Restated Partnership Agreement
Preferred units, redemption terms											At any time after the Closing Date, the Partnership shall have the right to redeem all of the outstanding Class D Preferred Units at a price per Class D Preferred Unit equal to the sum of the then-unpaid accumulations with respect to such Class D Preferred Unit and the greater of either the applicable multiple on invested capital or the applicable redemption price based on an applicable internal rate of return, as more fully described in the Amended and Restated Partnership Agreement. At any time on or after the eighth anniversary of the Closing Date, each Class D Preferred Unitholder will have the right to require the Partnership to redeem on a date not prior to the 180th day after such anniversary all or a portion of the Class D Preferred Units then held by such preferred unitholder for the then-applicable redemption price, which may be paid in cash or, at the Partnership’s election, a combination of cash and a number of common units not to exceed one-half of the aggregate then-applicable redemption price, as more fully described in the Amended and Restated Partnership Agreement. Upon a Class D Change of Control (as defined in the Amended and Restated Partnership Agreement), each Class D Preferred Unitholder will have the right to require the Partnership to redeem the Class D Preferred Units then held by such Preferred Unitholder at a price per Class D Preferred Unit equal to the applicable redemption price. The Class D Preferred Units generally will not have any voting rights, except with respect to certain matters which require the vote of the Class D Preferred Units. The Class D Preferred Units generally do not have any voting rights, except that the Class D Preferred Units shall be entitled to vote as a separate class on any matter on which unitholders are entitled to vote that adversely affects the rights, powers, privileges or preferences of the Class D Preferred Units in relation to other classes of Partnership Interests (as defined in the Amended and Restated Partnership Agreement) or as required by law. The consent of a majority of the then-outstanding Class D Preferred Units, with one vote per Class D Preferred Unit, shall be required to approve any matter for which the preferred unitholders are entitled to vote as a separate class or the consent of the representative of the Class D Preferred Unitholders, as applicable.
Preferred units, change of control terms											Upon a change of control, all unvested warrants shall immediately vest and be exercisable in full. A change of control occurs when (a) the current general partner owners cease to own, directly or indirectly, at least 50% of the outstanding voting securities of the general partner, (b) the general partner withdraws or is removed by the limited partners, (c) the common units are no longer listed on a national exchange, or (d) the general partners and/or its affiliates become beneficial owner, directly or indirectly, of 80% or more of the outstanding common units or any transaction or event that occurs due to default on our credit agreement.
Board rights agreement								In connection with the issuance of the Class D Preferred Units, we entered into a board rights agreement pursuant to which affiliates of the purchasers of the Class D Preferred Units (“Purchasers”) will have the right to designate one director on the board of directors of our general partner, so long as the Purchasers and their respective affiliates, in the aggregate, own either at least (i) (A) 50% of the number of Class D Preferred Units issued on the Closing Date or (B) 50% of the aggregate liquidation preference of any class or series of Class D Parity Securities (as defined in the Amended and Restated Partnership Agreement), or (ii) warrants and/or common units that, in the aggregate, comprise 10% or more of the then-outstanding common units.
Class D Preferred Units
Class of Stock
Distributions earned during the quarter but not paid | $ / shares									$ 27.32
Class D Preferred Units | Cumulative distributions
Class of Stock
Distributions earned but not declared | $ / shares													$ 135.28
Cumulative distributions earned but not paid on including accumulated interest													$ 85,400
Class D Preferred Units First Issuance
Class of Stock
Warrants outstanding (in units) | shares								17,000,000
Class D Preferred Units Second Issuance
Class of Stock
Warrants outstanding (in units) | shares							8,500,000				8,500,000
Warrant | Class D Preferred Units First Issuance
Class of Stock
Issuance of warrants, net of offering costs (Note 9)								$ 41,700
Warrant | Class D Preferred Units Second Issuance
Class of Stock
Issuance of warrants, net of offering costs (Note 9)							$ 11,100
Premium Warrants | Class D Preferred Units First Issuance
Class of Stock
Warrants outstanding (in units) | shares								10,000,000
Class of warrant or right, exercise price | $ / shares								$ 17.45
Premium Warrants | Class D Preferred Units Second Issuance
Class of Stock
Warrants outstanding (in units) | shares							5,000,000				5,000,000
Class of warrant or right, exercise price | $ / shares							$ 16.28				$ 16.28
Par Warrants | Class D Preferred Units First Issuance
Class of Stock
Warrants outstanding (in units) | shares								7,000,000
Class of warrant or right, exercise price | $ / shares								$ 14.54
Par Warrants | Class D Preferred Units Second Issuance
Class of Stock
Warrants outstanding (in units) | shares							3,500,000				3,500,000
Class of warrant or right, exercise price | $ / shares							$ 13.56				$ 13.56