Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended	12 Months Ended					9 Months Ended						3 Months Ended
	Sep. 23, 2012	Sep. 25, 2011	Sep. 23, 2012	Sep. 25, 2011	Dec. 25, 2011	Jun. 24, 2012 Fair Value, Measurements, Nonrecurring [Member]	Dec. 25, 2011 Fair Value, Measurements, Nonrecurring [Member]	Sep. 23, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]	Sep. 23, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 23, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 23, 2012 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value, Fair Value Disclosure [Member]	Sep. 23, 2012 Cost-method Investments [Member]	Sep. 23, 2012 Cost-method Investments [Member] Fair Value, Measurements, Nonrecurring [Member]	Sep. 23, 2012 Cost-method Investments [Member] Fair Value, Measurements, Nonrecurring [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]	Sep. 23, 2012 Cost-method Investments [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Sep. 23, 2012 Cost-method Investments [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 23, 2012 Cost-method Investments [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 24, 2012 About Group [Member] Fair Value, Measurements, Nonrecurring [Member]		Sep. 23, 2012 About Group [Member] Fair Value, Measurements, Nonrecurring [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]		Sep. 23, 2012 About Group [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 23, 2012 About Group [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 23, 2012 About Group [Member] Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, fair value								$ 7,674	$ 0	$ 0	$ 7,674
Goodwill, fair value																				172,544	[1]	0	[1]	0	[1]	172,544	[1]
Impairment of assets, goodwill			194,732	152,093														194,732	[1],[2]
Cost-method Investments, fair value														0	0	0	0
Impairment of investments	600	0	5,500	0								5,500	5,500
Impairment Testing Annual Growth Rate Assumption						3.50%	5.00%
Impairment Testing Discount Rate Assumption						15.00%	13.80%
Long-term Debt, carrying value	695,000		695,000		692,000
Long-term Debt, fair value	$ 850,000		$ 850,000		$ 800,000

[1] Goodwill relates to the About Group and is classified within “Assets held for sale” as of September 23, 2012. See Note 11 for additional information.

[2] Impairment losses relate to the About Group and are included within “Income/(loss) from discontinued operations, net of income taxes” for the nine months ended September 23, 2012. See Note 11 for additional information.