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Earnings and Dividends per Share - Additional Information (Detail) - $ / shares
 3 Months Ended 6 Months Ended
Jun. 26, 2015
Jun. 30, 2015
Jun. 30, 2015
Earnings And Dividends Per Share [Abstract]      
Shares not included in computation of diluted Earning per share   1,200,000 1,200,000
Non forfeitable dividend rights with holders of common stock     One-for-one basis
Number of unvested restricted stock awards outstanding that are expected not to vest   0 0
Common Stock, dividends, per share, declared $ 0.066    
Common Stock, dividends, per share, Paid $ 0.066