Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 25, 2012	Dec. 25, 2011
Debt Disclosure [Line Items]
Long-term Debt	$ 1,665,329	$ 1,760,363
Unsecured notes bearing fixed rate interest at 6.375% due April 2012
Debt Disclosure [Line Items]
Long-term Debt	306,567	306,534
Borrowings under revolving credit agreements expiring September 2014
Debt Disclosure [Line Items]
Long-term Debt	138,000	235,000
Unsecured notes bearing fixed rate interest at 8.75% due November 2014
Debt Disclosure [Line Items]
Long-term Debt	247,792	247,609
Unsecured notes bearing fixed rate interest at 10% due June 2015
Debt Disclosure [Line Items]
Long-term Debt	59,936	59,522
Unsecured notes bearing fixed rate interest at 6.375% due September 2015
Debt Disclosure [Line Items]
Long-term Debt	248,114	247,995
Unsecured notes bearing fixed rate interest at 10% due April 2016
Debt Disclosure [Line Items]
Long-term Debt	170,808	169,775
Unsecured notes bearing fixed rate interest at 9.375% due November 2017
Debt Disclosure [Line Items]
Long-term Debt	247,258	247,168
Unsecured notes bearing fixed rate interest at 7.125% due September 2018
Debt Disclosure [Line Items]
Long-term Debt	$ 246,854	$ 246,760