CAPITAL STOCK AND STOCK AWARD PLANS - Summary of Nonvested Restricted Stock Grants (Details)	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Number of Restricted Shares and Stock Units
Unvested, Ending Balance (in shares) | shares	1,215,459
Weighted Average Grant Date Fair Value
Unvested, Ending Balance (in dollars per share) | $ / shares	$ 58.71
Restricted Stock and Restricted Stock Units
Number of Restricted Shares and Stock Units
Unvested, Beginning Balance (in shares) | shares	1,240,156
Granted (in shares) | shares	280,097
Vested (in shares) | shares	(386,859)
Forfeitures (in shares) | shares	(75,944)
Unvested, Ending Balance (in shares) | shares	1,057,450
Weighted Average Grant Date Fair Value
Unvested, Beginning Balance (in dollars per share) | $ / shares	$ 56.70
Granted (in dollars per share) | $ / shares	74.17
Vested (in dollars per share) | $ / shares	54.39
Forfeitures (in dollars per share) | $ / shares	56.41
Unvested, Ending Balance (in dollars per share) | $ / shares	$ 62.20