Debt - Debt Acquired in Acquisition of Herley (Details) (USD $)			12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 30, 2012 10-year term loan
Debt Instrument [Line Items]
Principal amount outstanding	$ 630,700,000	$ 631,800,000	$ 10,000,000
Maturity period			10 years
Carrying amount	649,400,000	654,600,000	5,700,000
Quarterly installment payment - principal			$ 300,000
Basis spread on variable rate			1.50%