Earnings Per Share - Computations of Basic and Diluted Earnings Per Share (Detail) (USD $)	3 Months Ended		6 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 29, 2012	Dec. 31, 2011
Basic earnings per share:
Net income	$ 13,221,000	$ 9,466,000	$ 25,115,000	$ 17,759,000
Less: Income allocable to participating securities	(200,000)	0	(400,000)	0
Earnings available to common stockholders	13,000,000	9,500,000	24,700,000	17,800,000
Weighted average shares outstanding, basic	18,841,000	18,493,000	18,761,000	18,462,000
Earnings per share, basic	$ 0.69	$ 0.51	$ 1.32	$ 0.96
Diluted earnings per share:
Earnings available to common stockholders	$ 13,000,000	$ 9,500,000	$ 24,700,000	$ 17,800,000
Weighted average shares outstanding, basic	18,841,000	18,493,000	18,761,000	18,462,000
Weighted average effect of non-vested restricted stock grants and assumed exercise of stock options	300,000	200,000	200,000	100,000
Weighted average shares outstanding, diluted	19,099,000	18,660,000	19,024,000	18,635,000
Earnings per share, diluted	$ 0.68	$ 0.51	$ 1.30	$ 0.95