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Carrying And Estimated Fair Value Of Other Financial Instruments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Fair Value Disclosures [Abstract]    
Acquisition-related contingent consideration, including current portion, Carrying Amount [1] $ 5,692 $ 4,394
Long-term debt, Carrying Amount 370,000 500,000
Total, Carrying Amount 375,692 504,394
Acquisition-related contingent consideration, including current portion, Estimated Fair Value [1] 5,692 4,394
Long-term debt, Estimated Fair Value 382,750 513,500
Total, Estimated Fair Value $ 388,442 $ 517,894
[1] The short-term portion is included in “Accounts payable, accrued expenses and other” and the long-term portion is included in “Other liabilities” on the Consolidated Balance Sheets.