Other Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Accrued Liabilities [Line Items]
Balance at beginning of period	$ 8,153	$ 9,886	$ 6,435
Acquisition		327
Acquisition		3,151
Accruals for warranties issued during the period	14,704	13,167	17,084
Accruals related to pre-existing warranties	877	(2,689)	(1,338)
Settlements made during the period	(13,948)	(12,538)	(12,295)
Balance at end of period	9,786	8,153	9,886
Balance at beginning of period	12,742	8,972	4,462
Deferral of new extended warranty revenue	22,344	8,659	7,696
Recognition of extended warranty deferred revenue	(8,099)	(8,040)	(3,186)
Balance at end of period	$ 26,987	$ 12,742	$ 8,972