Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation Plans (Summary of Stock Option Activity) (Detail)

v3.8.0.1
Stock Based Compensation Plans (Summary of Stock Option Activity) (Detail) - Employee Stock Option [Member]
3 Months Ended
Mar. 31, 2018
$ / shares
shares
Number of Options  
Outstanding, Beginning Balance | shares 1,510,244
Granted | shares 0
Exercised | shares 0
Expired or Forfeited | shares (29,435)
Outstanding, Ending Balance | shares 1,480,809
Weighted Average Exercise Price  
Outstanding, Beginning Balance | $ / shares $ 5.04
Granted | $ / shares 0
Exercised | $ / shares 0
Expired or Forfeited | $ / shares 7.81
Outstanding, Ending Balance | $ / shares $ 4.99