Income Taxes (Details 3) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Changes in unrecognized tax benefits
Unrecognized tax benefits, balance at the beginning of the period	$ 10,943,000	$ 10,789,000	$ 12,160,000
Additions based on tax positions related to current year	1,818,000	757,000	1,742,000
Reductions for tax positions related to prior years	(8,397,000)	(603,000)	(3,113,000)
Unrecognized tax benefits, balance at the end of the period	4,364,000	10,943,000	10,789,000
Gross unrecognized tax benefits which would affect the effective tax rate if recognized	4,100,000	9,900,000	9,700,000
Income Tax Penalties and Interest Expense
Decreases of interest, net of tax			100,000
Reasonably possible change in unrecognized tax position end in next twelve months
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 1,300,000