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Summary of Significant Accounting Policies - Summary of Estimated Fair Values of Fixed Interest Rate, Long-term Debt Instrument (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
11% senior unsecured notes carrying value (Level 2)	$ 79,750
Level 2 input [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
11% senior unsecured notes carrying value (Level 2)	77,480
11% senior unsecured notes at fair value (Level 2)	$ 79,750

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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