Components of Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts receivable, net		$ 2,981
Inventories		8,231
Other assets	1,894	694
Property, plant and equipment		5,712
Assets of discontinued operations	1,894	17,618
Accounts payable, accrued expenses and other current liabilities		3,474
Deferred revenue		1,570
Other liabilities	2,681	561
Liabilities of discontinued operations	$ 2,681	$ 5,605