Quarterly report pursuant to Section 13 or 15(d)

Debt Obligations - Long-term Debt Obligations (Parenthetical) (Detail)

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Debt Obligations - Long-term Debt Obligations (Parenthetical) (Detail)
Jun. 30, 2015
Dec. 31, 2014
Minimum [Member] | Other Long Term Debt [Member]    
Debt Instrument [Line Items]    
Capital leases and Other long-term debt interest rates 1.40% 1.40%
Minimum [Member] | Capital Leases [Member]    
Debt Instrument [Line Items]    
Capital leases and Other long-term debt interest rates 6.00% 6.00%
Maximum [Member] | Other Long Term Debt [Member]    
Debt Instrument [Line Items]    
Capital leases and Other long-term debt interest rates 4.30% 4.30%
Maximum [Member] | Capital Leases [Member]    
Debt Instrument [Line Items]    
Capital leases and Other long-term debt interest rates 7.30% 7.30%