Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets:
Foreign currency forward and option contracts	$ 10,962	$ 1,489
Foreign currency forward and option contracts		4,060
Total assets	18,899	113,505
Liabilities:
Long-term debt	70,000	75,000
Total liabilities	77,115	76,261
Other Accrued Expenses and Current Liabilities [Member]
Liabilities:
Foreign currency forward and option contracts	835	1,261
Other Long-Term Liabilities [Member]
Liabilities:
Contingent consideration included in "Other long-term liabilities"	6,280
Foreign Currency Forward and Option Contracts [Member] | Other Current Assets [Member]
Assets:
Foreign currency forward and option contracts	10,962	1,489
Foreign Currency Forward and Option Contracts [Member] | Other Accrued Expenses and Current Liabilities [Member]
Liabilities:
Foreign currency forward and option contracts	835	1,261
Foreign Currency Forward Contracts [Member] | Deferred Charges and Other Assets [Member]
Assets:
Foreign currency forward and option contracts		4,060
Equity Investments Held in a Rabbi Trust for the Deferred Compensation Plan [Member] | Other Current Assets [Member]
Assets:
Investments held in a rabbi trust for the Deferred Compensation Plan	6,229	5,589
Debt Investments Held in a Rabbi Trust for the Deferred Compensation Plan [Member] | Other Current Assets [Member]
Assets:
Investments held in a rabbi trust for the Deferred Compensation Plan	1,622	1,363
Guaranteed Investment Certificates [Member] | Deferred Charges and Other Assets [Member]
Assets:
"Money market funds, open-end mutual funds and guaranteed investment certificates included in "Deferred charges and other assets"	86	79
Money Market Funds and Open-End Mutual Funds [Member]
Assets:
Money market funds and open-end mutual funds included in "Cash and cash equivalents"		100,915
"Money market funds, open-end mutual funds and guaranteed investment certificates included in "Deferred charges and other assets"		10
Quoted Prices in Active Markets For Identical Assets Level 1 [Member]
Assets:
Total assets	7,851	107,877
Quoted Prices in Active Markets For Identical Assets Level 1 [Member] | Equity Investments Held in a Rabbi Trust for the Deferred Compensation Plan [Member] | Other Current Assets [Member]
Assets:
Investments held in a rabbi trust for the Deferred Compensation Plan	6,229	5,589
Quoted Prices in Active Markets For Identical Assets Level 1 [Member] | Debt Investments Held in a Rabbi Trust for the Deferred Compensation Plan [Member] | Other Current Assets [Member]
Assets:
Investments held in a rabbi trust for the Deferred Compensation Plan	1,622	1,363
Quoted Prices in Active Markets For Identical Assets Level 1 [Member] | Money Market Funds and Open-End Mutual Funds [Member]
Assets:
Money market funds and open-end mutual funds included in "Cash and cash equivalents"		100,915
"Money market funds, open-end mutual funds and guaranteed investment certificates included in "Deferred charges and other assets"		10
Significant Other Observable Inputs Level 2 [Member]
Assets:
Total assets	11,048	5,628
Liabilities:
Long-term debt	70,000	75,000
Total liabilities	70,835	76,261
Significant Other Observable Inputs Level 2 [Member] | Foreign Currency Forward and Option Contracts [Member] | Other Current Assets [Member]
Assets:
Foreign currency forward and option contracts	10,962	1,489
Significant Other Observable Inputs Level 2 [Member] | Foreign Currency Forward and Option Contracts [Member] | Other Accrued Expenses and Current Liabilities [Member]
Liabilities:
Foreign currency forward and option contracts	835	1,261
Significant Other Observable Inputs Level 2 [Member] | Foreign Currency Forward Contracts [Member] | Deferred Charges and Other Assets [Member]
Assets:
Foreign currency forward and option contracts		4,060
Significant Other Observable Inputs Level 2 [Member] | Guaranteed Investment Certificates [Member] | Deferred Charges and Other Assets [Member]
Assets:
"Money market funds, open-end mutual funds and guaranteed investment certificates included in "Deferred charges and other assets"	86	$ 79
Significant Unobservable Inputs Level 3 [Member]
Liabilities:
Total liabilities	6,280
Significant Unobservable Inputs Level 3 [Member] | Other Long-Term Liabilities [Member]
Liabilities:
Contingent consideration included in "Other long-term liabilities"	$ 6,280