Debt - Restricted Cash Held by Bond Trustee (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Restricted Cash and Cash Equivalents [Abstract]
Bond proceeds	$ 68,995
Disbursement of funds	(63,809)
Interest paid on bonds	(727)
Funds transferred to current restricted assets (to pay interest on bonds)	413
Interest income	0
Total restricted bond cash held by Trustee	4,872
Restricted cash for bond collateral held by Trustee	71,278
Total restricted cash held by Trustee	76,150
Current restricted cash held by Trustee	(5,894)	$ (25,032)	$ (57,645)
Long-term restricted cash	$ 70,256	$ 70,168	$ 70,464

Restricted Cash And Cash Equivalents, Bond Proceeds

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Restricted Cash And Cash Equivalents, Disbursement Of Funds

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Restricted Cash And Cash Equivalents, Funds Transferred To Current Restricted Assets To Pay Interest On Bonds

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Restricted Cash And Cash Equivalents, Held By Bond Trustee

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Restricted Cash And Cash Equivalents, Interest Income

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Restricted Cash And Cash Equivalents, Interest Paid On Bonds

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Restricted Cash And Cash Equivalents, Restricted Cash For Collateral

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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