Annual report pursuant to Section 13 and 15(d)

Subsequent Event - Dividend Declaration - Additional Information (Detail)

v3.3.1.900
Subsequent Event - Dividend Declaration - Additional Information (Detail) - $ / shares
3 Months Ended
Feb. 19, 2016
Aug. 15, 2013
Dec. 31, 2015
Subsequent Event [Line Items]      
Cash Dividends approved per common share   $ 0.25 $ 0.27
Date of Record     Mar. 07, 2016
Dividend Payable Date     Mar. 18, 2016
Subsequent Event | Chief Executive Officer      
Subsequent Event [Line Items]      
Minimum annual equity award as percentage of salary 200.00%