LONG-TERM STOCK INCENTIVE PLAN - Issued and Outstanding Stock Options (Details) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Number of Shares
Options outstanding at the beginning of period (in shares)	794,125	1,125,625
Granted (in shares)	0	0
Exercised (in shares)	0	0
Forfeited (in shares)	0	(117,000)
Expired (in shares)	(290,200)	(199,500)
Options outstanding at the end of period (in shares)	503,925	809,125
Options exercisable at the end of period (in shares)	503,925	809,125
Weighted Average Exercise Price
Options outstanding at the beginning of period (in dollars per share)	$ 15.30	$ 15.43
Granted (in dollars per share)	0.00	0.00
Exercised (in dollars per share)	0.00	0.00
Forfeited (in dollars per share)	0.00	15.85
Expired (in dollars per share)	16.45	15.74
Options outstanding at the end of period (in dollars per share)	14.63	15.29
Options exercisable at the end of period (in dollars per share)	$ 14.63	$ 15.29