Derivative Instruments - Location and Fair Value of Foreign Currency Sales Contracts Recorded on Consolidated Balance Sheets (Detail) (Foreign Currency Sales Contracts - Cash Flow Hedges [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accounts Receivable for Fair Value Hedged Item [Member]
Derivative [Line Items]
Fair value hedged items	$ 95	$ (94)
Other Current Assets [Member]
Derivative [Line Items]
Cash flow hedge contracts	0	46
Fair value hedge contracts	0	218
Fair value hedged items	431	0
Other Current Liabilities [Member]
Derivative [Line Items]
Fair value hedge contracts	555	0
Fair value hedged items	$ 0	$ 223