Derivative Instruments - Location and Fair Value of Foreign Currency Sales Contracts Recorded on Consolidated Balance Sheets (Detail) (Foreign Currency Sales Contracts [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts Receivable for Fair Value Hedged Item [Member]
Derivative [Line Items]
Fair value hedged item	$ (36)	$ (94)
Other Current Assets [Member]
Derivative [Line Items]
Cash flow hedge contracts	0	46
Fair value hedge contracts	426	218
Other Noncurrent Assets [Member]
Derivative [Line Items]
Fair value hedge contracts	17	0
Other Current Liabilities [Member]
Derivative [Line Items]
Fair value hedged item	488	233
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Fair value hedged item	$ 40	$ 0