Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Additional Information (Detail)

v3.5.0.2
Earnings Per Share - Additional Information (Detail)
9 Months Ended
Sep. 30, 2016
Class A Common Stock [Member]  
Earnings Per Share [Line Items]  
Common stock, voting rights One vote per share
Class B Common Stock [Member]  
Earnings Per Share [Line Items]  
Common stock, voting rights Ten votes per share