Stock Compensation Plans and Stock Based Compensation (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Years Y	Jan. 01, 2011 Years
Summary of company stock option plans
Shares Options outstanding as of January 1, 2011	25,877
Shares Granted	3,053
Shares Acquired options	290
Shares Exercised	(1,332)
Shares Canceled and Forfeited	(4,892)
Shares Options outstanding as of December 31, 2011	22,996
Shares Options vested as of December 31, 2011	18,215
Shares Options vested as of December 31, 2011 and options expected to vest after December 31, 2011	22,884
Weighted-Average Exercise Price, Options outstanding as of January 1, 2011	$ 12.16
Weighted-Average Exercise Price Acquired options	$ 1.39
Weighted-Average Exercise Price Granted	$ 9.65
Weighted-Average Exercise Price Exercised	$ 4.86
Weighted-Average Exercise Price Canceled and Forfeited	$ 17.37
Weighted-Average Exercise Price, Options outstanding as of December 31, 2011	$ 11.01
Weighted Average Exercise Price, Options vested as of December 31, 2011	$ 12.00
Weighted-Average Exercise Price, Options vested as of December 31, 2011 and options expected to vest after December 31, 2011	$ 11.02
Weighted-Average Remaining Contractual Term, Options vested as of December 31, 2011	2.9
Weighted-Average Remaining Contractual Term, Options vested as of December 31, 2011 and options expected to vest after December 31, 2011	3.5
Weighted-Average Remaining Contractual Term, Options outstanding as of December 31, 2011	3.5	3.7
Aggregate Intrinsic Value, Options vested as of December 31, 2011 and options expected to vest after December 31, 2011	$ 44,472
Aggregate Intrinsic Value, Options vested as of December 31, 2011	29,580
Aggregate Intrinsic Value, Options outstanding as of December 31, 2011	$ 44,692	$ 31,128