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Cash Dividend Distribution - Additional Information (Detail) (USD $)
0 Months Ended
May 30, 2014
Feb. 27, 2014
Jan. 15, 2014
Aug. 05, 2014
Subsequent Events [Member]
Dividends Payable [Line Items]        
Cash dividend distribution     $ 6,313,869  
Cash dividend distribution, per share     $ 0.143  
Dividends payment, date of record Jun. 30, 2014 Mar. 31, 2014 Dec. 31, 2013 Sep. 30, 2014
Cash dividend declared $ 7,329,546 $ 7,329,546   $ 7,329,546
Cash dividend declared, per share $ 0.166 $ 0.166   $ 0.166
Dividend payable date Jul. 15, 2014 Apr. 15, 2014   Oct. 15, 2014