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Schedule 2 - 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 receivable [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of year $ 13,543 $ 9,341 $ 6,542
Additions Charged to cost and expenses 6,003 10,387 12,879
Additions Charged (credited) to other accounts   (13) (501)
Deductions/ Other (7,577) (6,172) (9,579)
Balance at end of year 11,969 13,543 9,341
Deferred tax valuation allowance [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of year 26,361 19,124 21,023
Additions Charged to cost and expenses 5,111 7,237 (1,899)
Balance at end of year $ 31,472 $ 26,361 $ 19,124