STOCK OPTIONS - Activity (Details) - Stock option - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Outstanding at beginning of year (in shares)	1,190,295	1,355,905
Granted (in shares)	432,000	45,500
Exercised (in shares)	(55,000)	(204,670)
Forfeited/expired (in shares)	(67,500)	(6,440)
Outstanding at end of year (in shares)	1,499,795	1,190,295	1,355,905
Exercisable at end of year (in shares)	768,598	542,499
Weighted-Average Exercise Price
Outstanding at beginning of year (in dollars per share)	$ 13.15	$ 12.21
Granted (in dollars per share)	12.72	14.80
Exercised (in dollars per share)	9.02	7.31
Forfeited/expired (in dollars per share)	14.59	13.33
Outstanding at end of year (in dollars per share)	13.11	13.15	$ 12.21
Exercisable at end of year (in dollars per share)	12.75	11.82
Additional disclosure
Weighted-average fair value of options granted during the year (in dollars per share)	$ 2.98	$ 2.72	$ 3.05