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Long-Term Debt - Schedule of Revolving Credit Facility and Long-Term Debt (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Unamortized discount, net of premium and debt issuance costs $ (11,333) $ (12,261)
Long-term debt 490,502 459,044
Less current portion of long-term debt 9,665 9,410
Long-term debt due after one year, net 480,837 449,634
3.75% Working Capital Revolver Loan [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 30,000  
Senior Secured Notes Due 2023 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 435,000 435,000
5.25% Secured Promissory Note Due 2021 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 3,882 4,746
5.17% Secured Promissory Note Due 2023 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 12,210 12,705
8.32% Secured Financing Due 2023 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 12,804 13,476
8.75% Secured Loan Agreement Due 2025 [Member]    
Debt Instrument [Line Items]    
Debt carrying amount 7,789 5,219
Other [Member]    
Debt Instrument [Line Items]    
Debt carrying amount $ 150 $ 159