| 
           Long-Term Debt (Detail) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Sep. 30, 2013 
         | 
        
           Dec. 31, 2012 
         | 
      
|---|---|---|
| Debt Instrument [Line Items] | ||
| Long-term debt | $ 293,962 | $ 268,980 | 
| Less current portion | (3,118) | (20,108) | 
| Long-term debt and capital lease obligations, less current portion | 290,844 | 248,872 | 
| 
           Term Loan B 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 290,640 | |
| 
           Revolver 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 2,460 | |
| 
           Terminated Revolver 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 33,000 | |
| 
           Terminated 95/8% Senior Secured Second Lien Notes 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 212,622 | |
| 
           Terminated Subordinated debt 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 7,500 | |
| 
           Terminated Subordinated Debt due to Related Parties 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 15,000 | |
| 
           Capital leases and other loans 
         | 
        ||
| Debt Instrument [Line Items] | ||
| Long-term debt | $ 862 | $ 858 |