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Carrying And Estimated Fair Value Of Other Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]      
Acquisition-related contingent consideration, including current portion, Carrying Amount $ 13,329 [1] $ 16,426 [1]  
Long-term debt, including current portion, Carrying Amount 717,000 723,000  
Total, Carrying Amount 730,329 739,426  
Acquisition-related contingent consideration, including current portion, Estimated Fair Value 13,329 [1] 16,426 [1] 14,990
Long-term debt, including current portion, Estimated Fair Value 752,750 762,000  
Total, Estimated Fair Value $ 766,079 $ 778,426  
[1] The short-term portion is included in "Accounts payable, accrued expenses and other." The long-term portion is included in "Other liabilities."