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Debt - Schedule of Long-Term Debt (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021	Aug. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 234,493,000	$ 233,230,000
Unamortized debt discount	(18,909,000)	(20,035,000)
Debt issuance cost	(4,641,000)	(4,918,000)
Less: current maturities	(751,000)	(860,000)
Long-term debt, net of current portion	233,742,000	232,370,000
2025 Notes
Debt Instrument [Line Items]
Long-term debt, gross	256,970,000	256,970,000	$ 282,600,000
Total debt			314,800,000
Unamortized debt discount			$ (32,900,000)
Other debt
Debt Instrument [Line Items]
Long-term debt, gross	1,073,000	1,213,000
2017 Credit Facility | Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	$ 0

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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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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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