Long-Term Debt (Details 2)		3 Months Ended		6 Months Ended			3 Months Ended			6 Months Ended		6 Months Ended			6 Months Ended	1 Months Ended					1 Months Ended
	Jun. 25, 2011 USD ($)	Jun. 25, 2011 2.25% Senior convertible debentures USD ($)	Jun. 26, 2010 2.25% Senior convertible debentures USD ($)	Jun. 25, 2011 2.25% Senior convertible debentures USD ($)	Jun. 26, 2010 2.25% Senior convertible debentures USD ($)	Dec. 25, 2010 2.25% Senior convertible debentures USD ($)	Dec. 24, 2012 Credit agreement	Sep. 23, 2012 Credit agreement	Jun. 24, 2012 Credit agreement	Jun. 25, 2011 Credit agreement USD ($)	Feb. 24, 2011 Credit agreement USD ($)	Jun. 25, 2011 Credit agreement Base rate	Jun. 25, 2011 Credit agreement Federal funds rate	Jun. 25, 2011 Credit agreement One-month adjusted LIBOR rate	Jun. 25, 2011 Credit agreement LIBOR	Feb. 28, 2011 Term loan facilities	Jun. 25, 2011 Term loan facilities USD ($)	Jun. 25, 2011 U.S. term loan USD ($)	Jun. 25, 2011 Euro term loan EUR (€)	Jun. 25, 2011 Revolving credit facility USD ($)	Feb. 28, 2011 Incremental U.S. term loan	Jun. 25, 2011 Incremental U.S. term loan USD ($)
Debt Instrument
Maximum borrowing capacity										$ 900,000,000							$ 400,000,000	$ 230,000,000	€ 133,763,000	$ 350,000,000		$ 150,000,000
Maximum borrowing capacity under the credit agreement before amendment											750,000,000
Increase in the credit agreement's borrowing capacity available under specified circumstances										250,000,000
Percentage of capital stock of domestic subsidiaries (excluding disregarded entities) pledged as collateral for borrowings (as a percent)										100.00%
Percentage of capital stock of first-tier foreign subsidiaries and domestic subsidiaries treated as disregarded entities for U.S. federal income tax purposes pledged as collateral for borrowings (as a percent)										65.00%
Minimum book value on owned real property in the U.S. whose mortgages are pledged as collateral for borrowings										10,000,000
Number of quarterly installment payments																20					18
Interest rate margin, low end of range (as a percent)												0.75%			1.75%
Interest rate margin, high end of range (as a percent)												1.50%			2.50%
Interest rate margin (as a percent)												1.50%	0.50%	1.00%	2.50%
Number of consecutive quarters for which ratio of consolidated EBITDA less capital expenditures to consolidated cash interest expense is required to be maintained under financial covenants										4
Numerator for ratio of consolidated EBITDA less capital expenditures to consolidated cash interest expense, minimum										3.5
Denominator for ratio of consolidated EBITDA less capital expenditures to consolidated cash interest expense, minimum										1
Number of consecutive quarters for which ratio of consolidated indebtedness to consolidated EBITDA is required to be maintained under financial covenants										4
Numerator for the ratio of consolidated indebtedness to consolidated EBITDA, maximum							3.25	3.50	3.50	4.00
Denominator for the ratio of consolidated indebtedness to consolidated EBITDA, maximum							1	1	1	1
Outstanding under letters of credit										4,475,000
Face amount of debt		350,000,000		350,000,000
Initial conversion rate of common stock per $1000 of principal amount of Convertible Notes (in shares)				20.4337
Principal amount used for debt instrument conversion ratio		1,000		1,000
Initial conversion price of convertible notes into common stock (in dollars per share)		$ 48.94		$ 48.94
Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be redeemable (in days)				20
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be redeemable (in days)				30
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the notes to be convertible (as a percent)				130.00%
Number of consecutive business days immediately after any five consecutive trading day period during the note measurement period (in days)				5
Number of consecutive trading days before five consecutive business days during the note measurement period (in days)				5
Percentage of the trading price to the product of the last reported sale price of the entity's common stock and the conversion rate, maximum (as a percent)				98.00%
Number of months prior to the stated maturity date that the debt instrument is convertible at the option of the holder				2
Percentage of principal amount at which notes may be required to be repurchased in event of fundamental change by the entity (as a percent)				100.00%
Fair value		364,450,000		364,450,000
Unamortized debt discount		28,831,000		28,831,000		35,583,000
Amortization period of debt discount (in quarters)				8
Amount of equity component of convertible debt		88,492,000		88,492,000		88,492,000
Interest expense related to convertible debt		3,403,000	3,182,000	6,752,000	6,315,000
Effective interest rate (as a percent)		6.93%		6.93%
Contractual interest expense recognized on convertible debt		1,969,000	1,969,000	3,937,000	3,937,000
Principal maturities of existing debt excluding unamortized debt discount
June 2012	57,994,000
June 2013	435,478,000
June 2014	85,454,000
June 2015	199,618,000
June 2016	39,699,000
Total	$ 818,243,000	$ 349,995,000		$ 349,995,000		$ 349,995,000