Derivative Instruments - Location and Fair Value of Foreign Currency Sales Contracts Recorded on Condensed Consolidated Balance Sheets (Detail) - Foreign Currency Sales Contracts [Member] - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts Receivables [Member]
Derivative [Line Items]
Fair value hedged item	$ 443	$ 27
Other Current Assets [Member]
Derivative [Line Items]
Cash flow hedge contracts	0	10
Fair value hedge contracts	0	113
Fair value hedged item	1,300	255
Other Noncurrent Assets [Member]
Derivative [Line Items]
Fair value hedge contracts	0	0
Fair value hedged item	23	39
Other Current Liabilities [Member]
Derivative [Line Items]
Fair value hedge contracts	1,528	258
Fair value hedged item	0	116
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Fair value hedge contracts	18	49
Fair value hedged item	$ 0	$ 0