Stock-Based Awards - Class A Common Stock Reserved for Issuance (Details) (Class A Common Stock) In Thousands, unless otherwise specified	Dec. 30, 2012	Dec. 25, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, outstanding	14,593	18,166
Shares, available for issuance	15,058	17,019
Defined Contribution Benefit Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance	3,348	3,838
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance	6,410	6,410
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, available for issuance	5,300	6,771