Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock	Noncontrolling Interests in Subsidiaries
Balance at Dec. 28, 2008	$ 138,238	$ 352	$ 216,553	$ (3,818)	$ 133,759	$ (216,860)	$ 8,252
Balance (in shares) at Dec. 28, 2008		27,637
Comprehensive income:
Net income	61,209				57,453		3,756
Change in valuation of interest rate swap agreements, net of tax	1,388			1,388
Foreign currency translation	1,310			1,310
Other	36			36
Comprehensive income	63,943
Exercise of stock options (in shares)	612	612
Exercise of stock options	9,830	6	9,824
Tax effect of equity awards	(342)		(342)
Acquisition of Company common stock	(28,477)					(28,477)
Acquisition of Company common stock, shares		(1,319)
Net contributions (distributions) - noncontrolling interests	(3,840)						(3,840)
Stock-based compensation expense	5,817		5,817
Other	(132)		(132)
Balance at Dec. 27, 2009	185,037	358	231,720	(1,084)	191,212	(245,337)	8,168
Balance (in shares) at Dec. 27, 2009		26,930
Comprehensive income:
Net income	55,425				51,940		3,485
Change in valuation of interest rate swap agreements, net of tax	2,404			2,404
Foreign currency translation	(523)			(523)
Other	52			52
Comprehensive income	57,358
Exercise of stock options (in shares)	356	356
Exercise of stock options	6,410	3	6,122			285
Tax effect of equity awards	62		62
Acquisition of Company common stock	(46,936)					(46,936)
Acquisition of Company common stock, shares		(1,881)
Net contributions (distributions) - noncontrolling interests	(3,147)						(3,147)
Stock-based compensation expense	6,066		6,066
Issuance of restricted stock (in shares)		34
Issuance of restricted stock			(881)			881
Other	2,350		2,291			59
Balance at Dec. 26, 2010	207,200	361	245,380	849	243,152	(291,048)	8,506
Balance (in shares) at Dec. 26, 2010		25,439
Comprehensive income:
Net income	59,387				55,655		3,732
Change in valuation of interest rate swap agreements, net of tax	165			165
Foreign currency translation	864			864
Other	(29)			(29)
Comprehensive income	60,387
Exercise of stock options (in shares)	572	572
Exercise of stock options	14,042	6	14,036
Tax effect of equity awards	(1,400)		(1,400)
Acquisition of Company common stock	(65,323)					(65,323)
Acquisition of Company common stock, shares		(2,084)
Net contributions (distributions) - noncontrolling interests	(3,669)						(3,669)
Stock-based compensation expense	6,704		6,704
Issuance of restricted stock (in shares)		92
Issuance of restricted stock			(2,253)			2,253
Other	281		(11)			292
Balance at Dec. 25, 2011	$ 218,222	$ 367	$ 262,456	$ 1,849	$ 298,807	$ (353,826)	$ 8,569
Balance (in shares) at Dec. 25, 2011		24,019