Goodwill and Identified Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Balance at beginning of period	$ 212,518	$ 212,417
Reduction in goodwill associated with the sale of the cable access HFC Business	(14,547)	0
Foreign currency translation adjustment	51	101
Balance at end of period	$ 198,022	$ 212,518