Debt Obligations - Debt Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				12 Months Ended					0 Months Ended		12 Months Ended		12 Months Ended
	Dec. 25, 2011	Sep. 25, 2011	Jun. 26, 2011	Mar. 27, 2011	Dec. 25, 2011 Years	Dec. 26, 2010	Dec. 27, 2009	Dec. 25, 2011 Notes Due 2012 [Member]	Dec. 25, 2011 Notes Due 2015 [Member]	Aug. 15, 2011 Notes Due 2015 Called 2011 [Member]	Dec. 25, 2011 Notes Due 2015 Called 2011 [Member]	Dec. 26, 2010 Notes Due 2016 [Member]	Dec. 25, 2011 Notes Due 2016 [Member]	Dec. 27, 2009 Option To Repurchase Headquarters Building 2019 [Member]	Dec. 25, 2011 Option To Repurchase Headquarters Building 2019 [Member]	Dec. 25, 2011 Carlos Slim Helu [Member]
Debt Information
Debt instrument, face amount								$ 75,000	$ 250,000	$ 250,000	$ 250,000		$ 225,000		$ 225,000
Interest rate on debt								4.61%	5.00%	14.053%			6.625%
Warrants issued In connection with debt issuance											15,900
Class of warrant or right, exercise price of warrants or rights	$ 6.3572				$ 6.3572
Class A common stock ownership percentage																8.00%
Prepayment amount for redemption of 14.053% Notes					250,000	0	250,000			280,000
Accrued and unpaid interest for prepayment of 14.053% Notes										3,000
Make-whole premium amount for redemption of 14.053% Notes										27,000
Premium on debt redemptions	0	46,381	0	0	46,381	0	9,250
Proceeds from issuance of long-term debt												220,248
Debt instrument, fee amount												5,000		39,000
Debt instrument, interest rate, effective percentage												7.00%		13.00%
Sale leaseback financing, amortization period					10
Proceeds from sale-leaseback financing					0	0	210,502							210,502
Sale leaseback financing, lease term					15
Sale leaseback financing, lease renewal term					20
Sale leaseback purchase option price															$ 250,000