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Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period $ 1,748 $ 1,650 $ 2,151
Charged to Profit and Loss 124 1,381 3,518
Deduction from Reserves (1,187) (1,283) (4,019)
Balance at End of Period 685 1,748 1,650
Valuation Allowance of Deferred Tax Assets [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 940 926 105
Charged to Profit and Loss 954 14 872
Deduction from Reserves     (51)
Balance at End of Period $ 1,894 $ 940 $ 926