Fair Value - Fair Value of Financial Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Investments [Member] | Other Noncurrent Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 3,690	$ 3,358
Foreign Currency Exchange Contracts [Member] | Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	431	264
Foreign Currency Exchange Contracts [Member] | Other Current Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	555	223
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Investments [Member] | Other Noncurrent Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	3,690	3,358
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Foreign Currency Exchange Contracts [Member] | Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] | Foreign Currency Exchange Contracts [Member] | Other Current Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	0	0
Significant Other Observable Inputs (Level 2) [Member] | Investments [Member] | Other Noncurrent Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	0	0
Significant Other Observable Inputs (Level 2) [Member] | Foreign Currency Exchange Contracts [Member] | Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	431	264
Significant Other Observable Inputs (Level 2) [Member] | Foreign Currency Exchange Contracts [Member] | Other Current Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	555	223
Significant Unobservable Inputs (Level 3) [Member] | Investments [Member] | Other Noncurrent Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] | Foreign Currency Exchange Contracts [Member] | Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	0	0
Significant Unobservable Inputs (Level 3) [Member] | Foreign Currency Exchange Contracts [Member] | Other Current Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	$ 0	$ 0