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Earnings and Dividends per Share - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Earnings And Dividends Per Share [Abstract]    
Shares not included in computation of diluted Earning per share   40,000
Restricted stock awards participate in nonforfeitable dividend rights 1  
Number of non-vested restricted share awards outstanding 0 0
Common Stock, dividends, per share, declared $ 0.05 $ 0.05
Common Stock, dividends, per share, Paid $ 0.05 $ 0.05