Goodwill and Other Intangible Asset Data - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill And Other Intangible Assets [Line Items]
Intangible asset commitments accrued	$ 1,500	$ 3,500	$ 1,232
Minimum [Member]
Goodwill And Other Intangible Assets [Line Items]
Estimated useful life of Intangible Assets	1 year
Maximum [Member]
Goodwill And Other Intangible Assets [Line Items]
Estimated useful life of Intangible Assets	15 years
Patents And Other Intellectual Property [Member]
Goodwill And Other Intangible Assets [Line Items]
Acquired intangible assets	$ 37,200	$ 31,157