Calculation of Earnings Per Share (Detail) (As Restated [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 23, 2012	Sep. 25, 2011	Sep. 23, 2012		Sep. 25, 2011
As Restated [Member]
Basic earnings per common share:
Net income, net of redeemable noncontrolling interests	$ 13,031	$ 10,800	$ 44,301	[1]	$ 38,844	[1]
Weighted average shares outstanding	23,268	24,964	23,685		25,302
Basic earnings per common share	$ 0.56	$ 0.43	$ 1.87		$ 1.54
Earnings per common share - assuming dilution:
Net income, net of redeemable noncontrolling interests	$ 13,031	$ 10,800	$ 44,301	[1]	$ 38,844	[1]
Weighted average shares outstanding	23,268	24,964	23,685		25,302
Dilutive effect of outstanding compensation awards	453	182	422		226
Diluted weighted average shares outstanding	23,721	25,146	24,107		25,528
Earnings per common share - assuming dilution	$ 0.55	$ 0.43	$ 1.84		$ 1.52

[1] Net income at September 23, 2012 and September 25, 2011 is net of $3,292 and $2,868, respectively, allocable to the redeemable noncontrolling interests for our joint venture arrangements.