STOCK-BASED COMPENSATION PLANS - Summary of SAR Activity (Details) - SARs	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Stock Grants and SARs
Outstanding at the beginning of the year (in shares) | shares	1,910,000
Granted (in shares) | shares	400,000
Outstanding at the end of the year (in shares) | shares	2,310,000
Weighted-Average Price
Outstanding at the beginning of the year (in dollars per share) | $ / shares	$ 16.68
Granted (in dollars per share) | $ / shares	31.40
Outstanding at the end of the year (in dollars per share) | $ / shares	$ 19.23