Share-Based Payment Arrangements (Narrative) (Details) (USD $)

12 Months Ended

Dec. 31, 2011

Dec. 25, 2010

Dec. 26, 2009

Dec. 27, 2008

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options granted under the Plans exercisable

Options granted under the Plans generally become exercisable in either three or five equal annual installments commencing on the first anniversary of the date of grant or 100% four and one-half years from the date of grant or 100% on the third or fifth anniversary from the date of grant, subject to acceleration in certain circumstances. All options granted under the Plans expire on the tenth anniversary of the date of grant. Under the Plans, the exercise price of each option equals the fair market value of the Company's Common Stock on the date of grant.

The weighted average grant date fair value of stock options granted

$ 12.06

$ 12.03

$ 12.30

Total intrinsic value of stock options exercised during periods

$ 1,052,000

$ 9,657,000

$ 3,816,000

Intrinsic value of stock options exercisable

9,091,000

Stock options outstanding, intrinsic value

18,179,000

Stock options outstanding

2,326,776

2,295,831

2,557,802

2,505,644

Closing market price

47.92

Stock options exercisable

1,110,743

936,081

1,225,802

822,211

Restricted stock option vesting rights

Shares of restricted stock generally are granted under the 2011 EIP subject to vesting in three year annual installments or 100% on the third or fifth anniversary of the date of grant and the shares of restricted stock remain subject to forfeiture unless the grantee remains continuously employed with the Company or a subsidiary thereof through the applicable vesting date.

ESOSIP [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Common stock previously reserved for issuance

2,239,117

2011 EIP [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Common stock authorized for issuance

6,000,000

Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Total unrecognized compensation cost related to non-vested shares of restricted stock granted under the plans

1,227,000