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Earnings Per Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 14, 2015
Jun. 15, 2014
Jun. 14, 2015
Jun. 15, 2014
Earnings Per Share [Abstract]        
Anti-dilutive stock options to purchase common stock not included in calculating earnings per share 70,910 199,040 70,910 199,040