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Cash Dividend Distribution - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
0 Months Ended
Feb. 27, 2014
Jan. 15, 2014
Apr. 30, 2014
Subsequent Events [Member]
Dividends Payable [Line Items]      
Cash dividend distribution   $ 6.3  
Cash dividend distribution, per share   $ 0.143  
Cash dividend declared $ 7.3   $ 7.3
Cash dividend declared, per share $ 0.166   $ 0.166
Dividend payable date Apr. 15, 2014   Jul. 15, 2014
Dividends payment, Date of Record Mar. 31, 2014   Jun. 30, 2014