Calculation of Earnings Per Share (Detail) (As Restated [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 24, 2012	Jun. 26, 2011	Jun. 24, 2012		Jun. 26, 2011
As Restated [Member]
Basic earnings per common share:
Net income, net of redeemable noncontrolling interests	$ 14,289	$ 12,068	$ 31,270	[1]	$ 28,044	[1]
Weighted average shares outstanding	23,733	25,464	23,893		25,474
Basic earnings per common share	$ 0.60	$ 0.47	$ 1.31		$ 1.10
Earnings per common share - assuming dilution:
Net income, net of redeemable noncontrolling interests	$ 14,289	$ 12,068	$ 31,270	[1]	$ 28,044	[1]
Weighted average shares outstanding	23,733	25,464	23,893		25,474
Dilutive effect of outstanding equity awards	379	221	377		239
Diluted weighted average shares outstanding	24,112	25,685	24,270		25,713
Earnings per common share - assuming dilution	$ 0.59	$ 0.47	$ 1.29		$ 1.09

[1] Net income at June 24, 2012 and June 26, 2011 is net of $2,498 and $2,051, respectively, allocable to the redeemable noncontrolling interests for our joint venture arrangements.