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           Amortizable Intangible Assets, Estimate Amortization Expense (Detail) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Sep. 30, 2013 
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|---|---|
| Goodwill And Intangible Assets Disclosure [Abstract] | |
| 2013 (Oct - Dec) | $ 713 | 
| 2014 | 2,565 | 
| 2015 | 1,887 | 
| 2016 | 1,106 | 
| 2017 | 707 | 
| Thereafter | 1,158 | 
| Total | $ 8,136 | 
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- Definition 
          Amount of amortization expense expected to be recognized in the next rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available. 
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- Definition 
          Amount of amortization expense expected to be recognized after the fifth rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available. 
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- Definition 
          Amount of amortization expense expected to be recognized in the fifth rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available. 
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- Definition 
          Amount of amortization expense expected to be recognized in the fourth rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available. 
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- Definition 
          Amount of amortization expense expected to be recognized in the third rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available. 
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- Definition 
          Amount of amortization expense expected to be recognized in the second rolling twelve months following the latest balance sheet presented for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available. 
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- Definition 
          Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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