Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at End of Year	$ 12,627	$ 10,927
Balance at End of Year	102,148	37,808
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	10,927	14,826	18,528
Additions Through Acquisition	435		370
Charged to Costs and Expenses	3,272	98	(541)
Deductions (Write-Offs and Recoveries, net)	(2,007)	(3,997)	(3,531)
Balance at End of Year	12,627	10,927	14,826
Deferred Tax Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	37,808	32,739	22,717
Additions Through Acquisition	193
Allowance Recorded on Current Year Losses	16,119	5,315	4,104
Change in Valuation Allowance	47,684		3,514
Release of Allowance on Losses Expired or Revalued	344	(246)	2,404
Balance at End of Year	$ 102,148	$ 37,808	$ 32,739