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SHARE-BASED COMPENSATION PLANS - Summary of Outstanding Stock Options Activity (Detail) - 2011 Incentive Stock Plan - Employee Stock Option
 12 Months Ended
Dec. 31, 2018
$ / shares
shares
Shares  
Outstanding at beginning of year (in shares) | shares 59,583
Forfeited (in shares) | shares (2,235)
Expired (in shares) | shares (15,214)
Exercised (in shares) | shares (1,150)
Options outstanding and exercisable, at year end (in shares) | shares 40,984
Weighted Average Exercise Price  
Outstanding at beginning of year (in dollars per share) | $ / shares $ 25.89
Forfeited (in dollars per share) | $ / shares 28.02
Expired (in dollars per share) | $ / shares 30.11
Exercised (in shares) | $ / shares 21.14
Options outstanding and exercisable, at year end (in dollars per share) | $ / shares $ 24.34