Fair Value of Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Carrying Value and Estimated Fair Value of Financial Instruments

The following tables present the carrying values of those financial instruments and the estimated corresponding fair values at June 30, 2023 and December 31, 2022 (in thousands):

			Estimated Fair Value Measurements at June 30, 2023
	Carrying Value as of June 30, 2023		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	48,716	$	48,716	$	48,716	$	—	$	—
Restricted cash and investments		45,828		45,828		45,828		—		—
Liabilities:
Borrowings under exchange credit facility	$	1,007,724	$	1,021,141	$	—	$	1,021,141	$	—
10.500% Public Second Lien Notes due 2028		286,521		288,679		—		288,679		—
9.500% Private Second Lien Notes due 2028		239,142		235,555		—		235,555		—
5.875% Senior Notes due 2024		23,253		22,712		—		22,712		—
6.00% Senior Notes due 2026		110,858		102,197		—		102,197		—
6.50% Exchangeable Senior Notes due 2026		230,000		258,622		—		258,622		—

			Estimated Fair Value Measurements at December 31, 2022
	Carrying Value as of December 31, 2022		Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	95,073	$	95,073	$	95,073	$	—	$	—
Restricted cash and investments		48,770		48,770		48,770		—		—
Liabilities:
Borrowings under exchange credit facility	$	1,113,239	$	1,112,183	$	—	$	1,112,183	$	—
10.500% Public Second Lien Notes due 2028		286,521		291,610		—		291,610		—
9.500% Private Second Lien Notes due 2028		239,142		232,627		—		232,627		—
5.875% Senior Notes due 2024		23,253		22,997		—		22,997		—
6.00% Senior Notes due 2026		110,858		99,132				99,132
6.50% Exchangeable Senior Notes due 2026		230,000		327,872		—		327,872		—