Schedule of Other Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Accounts Payable And Accrued Liabilities Current And Noncurrent [Line Items]
Accrued expenses	$ 21,483		$ 19,165
Accrued co-op expenses	4,702		4,571
Restructuring reserves	14,836		5,347
Warranty obligations	9,711	9,686	10,475	10,478	9,950	10,577
Derivative liabilities	5,612		3,273
Employee stock purchase plan withholdings	4,768		10,186
Other accrued liabilities	10,480		10,001
Total other accrued liabilities	$ 71,592		$ 63,018