Derivatives and Hedging (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	$ 191,800,000	$ 239,400,000
Designated as Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	0	3,900,000
Foreign Currency Derivative Contracts | Designated as Cash Flow Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities		3,900,000
Intercompany balances | Not Designated for Hedge Accounting Treatment
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	99,200,000	144,500,000
Trade receivables | Not Designated for Hedge Accounting Treatment
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	52,200,000	44,400,000
Other net monetary assets | Not Designated for Hedge Accounting Treatment
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	40,400,000	46,600,000
Forward Contracts | Not Designated for Hedge Accounting Treatment
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative assets and liabilities	$ 191,800,000	$ 235,500,000