Financial Instruments and Fair Value Disclosures (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Values and Related Carrying Values of Our Debt Instruments

Fair values and related carrying values of our long-term debt are shown below (in millions).

	September 30, 2023				December 31, 2022
	Fair Value		Carrying Value		Fair Value		Carrying Value
Second Lien Notes	$	550.4	$	550.0	$	—	$	—
Exit Term Loans		—		—		91.1		100.0
First Lien Notes		—		—		78.3		85.3

Recurring Fair Value Measurements [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis

Assets and liabilities measured at fair value are summarized below (in thousands).

	September 30, 2023
	Fair Value Measurements Using
	Level 1			Level 2		Level 3		Assets (Liabilities) at Fair Value			Total Losses for Nine Months Ended (2)
Recurring fair value measurements:
Short-term investments (1)	$	109,880		$	—	$	—	$	109,880		$	—
Liability-classified Director restricted stock units		(1,417	)		—		—		(1,417	)		(413	)

(1)Represents short-term investments in debt securities classified as available-for-sale. As the original maturities of these debt securities are three months or less, we have reported that our $109.9 million investment in these debt securities as Cash and cash equivalents in our unaudited Condensed Consolidated Balance Sheet at September 30, 2023.

(2)Represents an increase in stock compensation expense due to the “marking-to-market” of liability-classified restricted stock units granted to our non-employee directors.

Nonrecurring Fair Value Measurements [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets Measured at Fair Value on Recurring and Nonrecurring Basis

	December 31, 2022
	Fair Value Measurements Using
	Level 1			Level 2		Level 3		Liabilities at  Fair Value			Total Losses for Year Ended (1)
Recurring fair value measurements:
Liability-classified Director restricted stock units	$	(1,258	)	$	—	$	—	$	(1,258	)	$	(230	)

(1)Represents an increase in stock compensation expense due to the “marking-to-market” of liability-classified restricted stock units granted to our non-employee directors.