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Subsequent Event - Additional Information (Detail) - $ / shares
3 Months Ended 9 Months Ended
Oct. 11, 2016
Jun. 30, 2016
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2016
Subsequent Event [Line Items]          
Cash dividends on common stock, per share   $ 0.01      
Cash dividend declaration date     Mar. 16, 2015 Dec. 11, 2014 Jun. 13, 2016
Cash dividend record date     Apr. 03, 2015 Dec. 26, 2014 Jun. 30, 2016
Cash dividend distributed date     Apr. 17, 2015 Jan. 09, 2015 Jul. 12, 2016
Subsequent Event          
Subsequent Event [Line Items]          
Cash dividends on common stock, per share $ 0.01        
Cash dividend declaration date Oct. 11, 2016        
Cash dividend record date Oct. 28, 2016        
Cash dividend distributed date Nov. 11, 2016