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Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 14, 2015	Jun. 15, 2014	Jun. 14, 2015	Jun. 15, 2014
Earnings Per Share [Abstract]
Net income available to common stockholders - basic and diluted	$ 45,909	$ 38,462	$ 92,198	$ 78,936
Basic weighted average number of shares	54,833,094	55,015,394	55,020,404	55,113,616
Earnings per share - basic	$ 0.84	$ 0.70	$ 1.68	$ 1.43
Diluted weighted average number of shares	56,628,237	57,124,457	56,820,743	57,246,871
Earnings per share - diluted	$ 0.81	$ 0.67	$ 1.62	$ 1.38

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.