Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured at Fair Value (Detail)

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Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Assets:    
Cash and cash equivalents $ 311  
Trade accounts receivable, net 40,168  
Fair value of interest rate swap 1,754 3,177
Liabilities:    
Accounts payable 5,252  
Accrued expenses including estimated fair value of contingent earn-out consideration 13,324  
Accrued interest 45  
Long term liabilities including estimated fair value of contingent earn-out consideration 4,151 452
Long-term debt 286,377  
Level 1
    
Assets:    
Cash and cash equivalents 311  
Trade accounts receivable, net 40,168  
Liabilities:    
Accounts payable 5,252  
Accrued expenses including estimated fair value of contingent earn-out consideration 11,671  
Accrued interest 45  
Long term liabilities including estimated fair value of contingent earn-out consideration 2,372  
Long-term debt 286,377  
Level 2
    
Assets:    
Fair value of interest rate swap 1,754  
Level 3
    
Liabilities:    
Accrued expenses including estimated fair value of contingent earn-out consideration 1,653  
Long term liabilities including estimated fair value of contingent earn-out consideration $ 1,779