Allocation of Estimated Consideration (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 01, 2012	Jan. 01, 2012
Zarlink Semiconductor, Inc.
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Cash and cash equivalents	$ 83,497
Accounts receivable	17,980
Inventory	28,403
Other current assets	37,585
Property and equipment	7,648
Other assets	41,639
Identifiable intangible assets	210,100
Goodwill	294,586
Current liabilities	(57,540)
Deferred tax liabilities	(35,963)
Other non-current liabilities	(4,265)
Total estimated consideration	623,670	623,670
Timing Business of Maxim Integrated Products, Inc.
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Inventory	2,741
Property and equipment	4
Identifiable intangible assets	12,960
Goodwill	28,509
Current liabilities	(169)
Total estimated consideration	$ 44,045