Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Stock Option Activity (Detail)

v3.6.0.2
Share-Based Compensation - Stock Option Activity (Detail)
12 Months Ended
Dec. 31, 2016
$ / shares
shares
Number of Shares  
Outstanding, beginning of period (shares) | shares 1,105,182
Granted (shares) | shares 0
Exercised (shares) | shares (151,142)
Cancelled (shares) | shares (18,600)
Expired (shares) | shares 2,500
Outstanding, end of period (shares) | shares 932,940
Weighted Average Exercise Price  
Outstanding, beginning of period (in dollars per share) | $ / shares $ 15.07
Granted (in dollars per share) | $ / shares 0.00
Exercised (in dollars per share) | $ / shares 15.01
Cancelled (in dollars per share) | $ / shares 17.62
Expired (in dollars per share) | $ / shares 16.78
Outstanding, end of period (in dollars per share) | $ / shares $ 15.02