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Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Debt Instrument [Line Items] |  |
Unamortized discount and debt issuance costs | $ (5,420) | $ (7,615)
Long-term debt | 410,413 | 420,220
Less current portion of long-term debt, net | 9,336 | 13,745
Long-term debt due after one year, net | 401,077 | 406,475
4.75% Working Capital Revolver Loan [Member] |  |
Debt Instrument [Line Items] |  |
Debt carrying amount |  | 0
Senior Secured Notes Due 2019 [Member] |  |
Debt Instrument [Line Items] |  |
Debt carrying amount | 375,000 | 375,000
Secured Promissory Note Due 2017 [Member] |  |
Debt Instrument [Line Items] |  |
Debt carrying amount |  | 6,566
5.73% Secured Promissory Note Due 2019 [Member] |  |
Debt Instrument [Line Items] |  |
Debt carrying amount | 8,417 | 9,167
5.25% Secured Promissory Note Due 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Debt carrying amount | 12,030 | 14,272
5.48% Secured Promissory Note Due 2023 [Member] |  |
Debt Instrument [Line Items] |  |
Debt carrying amount | 17,160 | 18,645
Other [Member] |  |
Debt Instrument [Line Items] |  |
Debt carrying amount | $ 3,226 | $ 4,185

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of unamortized debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
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