Income Tax - Components of Net Deferred Income Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax assets:
Property, plant & equipment	$ 82,152	$ 94,439
Net operating loss carryforward	183,050	178,279
Derivatives	4,800	14,438
Disallowed interest expense	7,467	5,579
Accrued liabilities	2,008	1,592
Other	7,103	3,469
Total deferred income tax assets	286,580	297,796
Valuation allowance	(284,928)	(297,195)
Net deferred income tax assets	1,652	601
Deferred income tax liabilities:
Derivatives	0	0
Other	1,652	601
Total deferred income tax liabilities	1,652	601
Net deferred income taxes	$ 0	$ 0