Calculation of Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 24, 2012	Jun. 30, 2013		Jun. 24, 2012
Basic earnings per common share:
Net income, net of redeemable noncontrolling interests	$ 17,150	$ 14,289	$ 36,456	[1]	$ 31,270	[1]
Weighted average shares outstanding	21,742	23,733	21,998		23,893
Basic earnings per common share	$ 0.79	$ 0.60	$ 1.66		$ 1.31
Earnings per common share - assuming dilution:
Net income, net of redeemable noncontrolling interests	$ 17,150	$ 14,289	$ 36,456	[1]	$ 31,270	[1]
Weighted average shares outstanding	21,742	23,733	21,998		23,893
Dilutive effect of outstanding equity awards	508	379	545		377
Diluted weighted average shares outstanding	22,250	24,112	22,543		24,270
Earnings per common share - assuming dilution	$ 0.77	$ 0.59	$ 1.62		$ 1.29

[1] Net income at June 30, 2013 and June 24, 2012 is net of $1,908 and $2,498, respectively, allocable to the redeemable noncontrolling interests for our joint venture arrangements.