Derivatives and Hedging - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	$ 191,800,000	$ 161,800,000
Designated as Cash Flow Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	3,800,000	3,200,000
British Pound Sterling, Brazilian Real, Israeli Shekel, Japanese Yen, Chinese Renminbi, and Eurodenominated [Member] | Not Designated for Hedge Accounting Treatment [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	99,600,000	90,700,000
Brazilian Real, British Pound Sterling, Australian Dollar, Canadian Dollar, Israeli Shekel and Eurodenominated Trade Receivables [Member] | Not Designated for Hedge Accounting Treatment [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	46,500,000	39,800,000
British Pounds Sterling, Indian Rupee, Israeli Shekel, Canadian Dollar, and Eurodenominated Other Net Monetary Assets [Member] | Not Designated for Hedge Accounting Treatment [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	41,900,000	28,200,000
Foreign Exchange Contracts [Member] | Designated as Cash Flow Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	3,800,000	3,200,000
Forward Contracts [Member] | Not Designated for Hedge Accounting Treatment [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	$ 188,000,000	$ 158,700,000