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Debt - Schedule of Debt (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
2013 Senior Secured Credit Facility, principal of $538 payable quarterly, matures in July 2020, net of unamortized discount of $390 and $446 as of June 30, 2014 and December 31, 2013, respectively	$ 212,721	$ 228,404
Less current portion	(10,877)	(17,300)
Debt, net of current portion	$ 201,844	$ 211,104

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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