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Carrying And Estimated Fair Value Of Other Financial Instruments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Fair Value Disclosures [Abstract]    
Acquisition-related contingent consideration, including current portion, Carrying Amount [1] $ 4,394 $ 6,338
Long-term debt, including current portion, Carrying Amount 500,000 711,000
Total, Carrying Amount 504,394 717,338
Acquisition-related contingent consideration, including current portion, Estimated Fair Value [1] 4,394 6,338
Long-term debt, including current portion, Estimated Fair Value 513,500 735,000
Total, Estimated Fair Value $ 517,894 $ 741,338
[1] The short-term portion is included in “Accounts payable, accrued expenses and other.” The long-term portion is included in “Other liabilities.”