Income Taxes (Reconciliation of Income Tax Computed at U.S. Federal Statutory Rate to Income Tax Expense) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
Income Tax Expense
Tax at U.S. federal statutory rate	$ 30,197	$ 28,798	$ 31,568
State and local income taxes	1,702	1,896	2,037
Foreign income taxes	1,273	1,171	904
Settlement of certain tax issues	(1,912)	(550)	(1,238)
Income of consolidated partnerships attributable to noncontrolling interests	(1,379)	(1,297)	(1,397)
Non-qualified deferred compensation plan loss (income)	153	(434)	(803)
Tax credits and other	(3,146)	(2,728)	(2,086)
Total	$ 26,888	$ 26,856	$ 28,985
Income Tax Rate
Tax at U.S. federal statutory rate	35.00%	35.00%	35.00%
State and local income taxes	2.00%	2.30%	2.20%
Foreign income taxes	1.50%	1.40%	1.00%
Settlement of certain tax issues	(2.20%)	(0.70%)	(1.40%)
Income of consolidated partnerships attributable to noncontrolling interests	(1.60%)	(1.60%)	(1.50%)
Non-qualified deferred compensation plan loss (income)	0.20%	(0.50%)	(0.90%)
Tax credits and other	(3.70%)	(3.30%)	(2.30%)
Total	31.20%	32.60%	32.10%