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) - Stock Options [Member] - shares
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Summary Of Significant Accounting Policies [Line Items]        
Shares with anti-dilutive effect   100,000   100,000
Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Shares with anti-dilutive effect 100,000   100,000