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Fair Value Measurements (Tables)
 3 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping
Fair Value
March 31, 2023
Carrying Value (1)
Level 1Level 2
Assets
Cash, cash equivalents and restricted cash$155,855 $155,855 $— 
Collateral on derivatives3,482 3,482 — 
Fair value of derivative assets – current7,734 — 7,734 
Fair value of derivative assets – noncurrent6,022 — 6,022 
Liabilities
Global Ultraco Debt Facility (1)(2)
225,300 — 225,300 
Convertible Bond Debt (1)(3)
104,119 — 160,562 
Fair value of derivative liabilities – current345 — 345 
Fair Value
December 31, 2022
Carrying Value (1)
Level 1Level 2
Assets
Cash, cash equivalents and restricted cash$189,754 $189,754 $— 
Collateral on derivatives909 909 — 
Fair value of derivative assets – current8,479 — 8,479 
Fair value of derivative assets – noncurrent8,184 — 8,184 
Liabilities
Global Ultraco Debt Facility (1)(2)
237,750 — 237,750 
Convertible Bond Debt (1)(3)
104,119 — 172,661 
Fair value of derivative liabilities – current163 — 163 
(1)
Carrying value represents outstanding principal amount and excludes debt discounts and debt issuance costs.
(2)
Fair value is based on the required repayment to the lenders if the debt was discharged in full on March 31, 2023 and December 31, 2022, as applicable.
(3)Fair value is based on pricing data (including observable trade information) sourced from Bloomberg.com.