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The percentage of economic interest in any future payments made under the strategic alliance agreement and under the portion of the collaboration agreement.

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The percentage of a debt instrument that will be retained by the issuer.

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Percentage of upward tiering royalties.

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The amount of third party expensed.

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Amount of the fee that accompanies borrowing money under the debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Long-Term Debt (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
Long-Term Debt (Details) - USD ($) $ in Thousands	Feb. 21, 2020	Nov. 30, 2018	Mar. 31, 2020
Debt Instrument [Line Items]
Interest rate (as a percent)			5.00%
Loss on extinguishment of debt			$ (15,464)
Issuer II Class C Units
Debt Instrument [Line Items]
Percentage of equity interest	75.00%
9.5% fixed rate term notes due 2035
Debt Instrument [Line Items]
Principal amount	$ 400,000		400,000
Less: 5% retention by the Company			(20,000)
Unamortized debt issuance costs			(4,350)
Total long-term debt			$ 373,854
Interest rate (as a percent)	9.50%		9.50%
Percentage of note to be retained	5.00%
Net principal			$ 380,000
Estimated fair value			376,200
Unamortized debt issuance costs			4,350
9.0% non-recourse notes due 2033
Debt Instrument [Line Items]
Principal amount		$ 250,000
Unamortized debt issuance costs		$ (1,800)	$ (1,796)
Interest rate (as a percent)		9.00%	9.00%
Percentage of debt redemption premium		5.00%
Loss on extinguishment of debt		$ 15,500
Unamortized debt issuance costs		1,800	$ 1,796
Creditors Fees Capitalized		4,400
Third Party Fees Expensed		$ 800
3.25% Convertible Senior Notes Due 2023
Debt Instrument [Line Items]
Principal amount			$ 230,000
Interest rate (as a percent)			3.25%
Notes fair value			$ 220,800
TRC
Debt Instrument [Line Items]
Percentage of economic interest	85.00%		85.00%
Percentage of equity interest			85.00%
TRC \| Minimum
Debt Instrument [Line Items]
Upward tiering royalties (as a percent)	6.50%
TRC \| Maximum
Debt Instrument [Line Items]
Upward tiering royalties (as a percent)	10.00%
TRC \| Issuer II Class C Units
Debt Instrument [Line Items]
Percentage of economic interest	63.75%