XML 84 R75.htm IDEA: XBRL DOCUMENT v3.7.0.1
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Jul. 18, 2017
Jun. 30, 2017
Aug. 17, 2017
Subsequent Event [Line Items]      
Dividend declaration date   Jul. 18, 2017  
Dividend record date   Aug. 03, 2017  
Dividend payment date   Aug. 17, 2017  
Scenario Forecast [Member]      
Subsequent Event [Line Items]      
Quarterly dividend payable subsequent to balance sheet date     $ 4.3
Subsequent Events [Member]      
Subsequent Event [Line Items]      
Common stock dividends per share declared $ 0.09