Long-Term Debt - Schedule of Revolving Credit Facility and Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Unamortized discount, net of premium, and debt issuance costs	$ (12,261)	$ (14,962)
Long-term debt	459,044	425,199
Less current portion of long-term debt (F)	9,410	12,518
Long-term debt due after one year, net (F)	449,634	412,681
5.25% Working Capital Revolver Loan [Member]
Debt Instrument [Line Items]
Debt carrying amount		10,000
Senior Secured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt carrying amount	435,000	400,000
5.25% Secured Promissory Note Due 2021 [Member]
Debt Instrument [Line Items]
Debt carrying amount	4,746	8,090
6.03% Secured Promissory Note Due 2023 [Member]
Debt Instrument [Line Items]
Debt carrying amount	12,705	14,685
8.32% Secured Financing Due 2023 [Member]
Debt Instrument [Line Items]
Debt carrying amount	13,476
8.76% Secured Loan Agreement [Member]
Debt Instrument [Line Items]
Debt carrying amount	5,219
Secured Promissory Note Due 2019 [Member]
Debt Instrument [Line Items]
Debt carrying amount		7,165
Other [Member]
Debt Instrument [Line Items]
Debt carrying amount	$ 159	$ 221

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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