Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 16,086	$ 13,037
Accumulated Amortization	(8,321)	(6,024)
Carrying Value	7,765	7,013
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	11,100	11,100
Accumulated Amortization	(6,155)	(4,554)
Carrying Value	4,945	6,546
Acquired Developed Technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	4,338	1,300
Accumulated Amortization	(1,724)	(1,104)
Carrying Value	2,614	196
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Amount	400	400
Accumulated Amortization	(359)	(300)
Carrying Value	41	100
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Amount	248	237
Accumulated Amortization	(83)	(66)
Carrying Value	$ 165	$ 171