STOCK-BASED COMPENSATION PLANS - Changes in Stock Options (Details)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Options (in shares):
Options outstanding, beginning balance (in shares) | shares	250,000
Granted (in shares) | shares	125,000
Options outstanding, ending balance (in shares) | shares	375,000
Weighted-Average Price (in dollars per share):
Options outstanding, weighted average price, beginning balance (in dollars per share) | $ / shares	$ 29.95
Options granted, weighted average price (in dollars per share) | $ / shares	33.35
Options outstanding, weighted average price, ending balance (in dollars per share) | $ / shares	$ 31.08