Extended Product Warranty Included in Short and Long-Term Deferred Revenue and Customer Advances (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Accrued Liabilities [Line Items]
Balance at beginning of period	$ 26,987	$ 12,742	$ 8,972
Acquisition			3,151
Deferral of new extended warranty revenue	20,191	22,344	8,659
Recognition of extended warranty deferred revenue	(12,789)	(8,099)	(8,040)
Balance at end of period	$ 34,389	$ 26,987	$ 12,742