STOCK COMPENSATION PLANS (Details 2) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares
Time-Based
Shares
Outstanding at beginning of period (in shares) | shares	933,312
Granted (in shares) | shares	496,580
Vested (in shares) | shares	(119,867)
Forfeited (in shares) | shares	(96,320)
Outstanding at end of period (in shares) | shares	1,213,705
Weighted Average Grant-Date Fair Value
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 36.83
Granted (in dollars per share) | $ / shares	31.47
Vested (in dollars per share) | $ / shares	25.34
Forfeited (in dollars per share) | $ / shares	35.65
Outstanding at end of period (in dollars per share) | $ / shares	$ 35.86
Total unrecognized compensation cost | $	$ 27.1
Weighted average period to recognize unrecognized compensation cost (in years)	1 year 9 months 26 days
Performance-Based
Shares
Outstanding at beginning of period (in shares) | shares	389,358
Granted (in shares) | shares	159,407
Vested (in shares) | shares	(138,019)
Forfeited (in shares) | shares	0
Outstanding at end of period (in shares) | shares	410,746
Weighted Average Grant-Date Fair Value
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 34.21
Granted (in dollars per share) | $ / shares	29.18
Vested (in dollars per share) | $ / shares	25.25
Forfeited (in dollars per share) | $ / shares	0.00
Outstanding at end of period (in dollars per share) | $ / shares	$ 35.27
Total unrecognized compensation cost | $	$ 9.5
Weighted average period to recognize unrecognized compensation cost (in years)	1 year 8 months 5 days