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Long-Term Obligations - Schedule of Long-Term Obligations (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Apr. 17, 2017
Mar. 28, 2017
Mar. 13, 2017
Dec. 31, 2016
Debt Instrument [Line Items]          
Capital leases and other long-term obligations $ 3,956       $ 3,325
Total debt 187,666       179,599
Total debt 187,666       179,599
Less current portion (15,958)       (1,973)
Long-term obligations, net of current portion 171,708       177,626
2017 Senior Credit Facility [Member]          
Debt Instrument [Line Items]          
Long-term obligations 180,000        
Debt instrument unamortized discount (3,000)     $ (3,172)  
Debt issuance costs (3,176)        
2015 Senior Secured Credit Facilities Due 2018 [Member]          
Debt Instrument [Line Items]          
Long-term obligations         86,750
Debt issuance costs         (1,738)
6.25% Convertible Notes Due 2018 [Member]          
Debt Instrument [Line Items]          
Convertible notes 10,044 $ 10,044 $ 94,000   94,000
Debt instrument unamortized discount (131)       (2,271)
Debt issuance costs (27)       (467)
Total debt 9,913       91,729
Total debt $ 9,913       $ 91,729