STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Millions	12 Months Ended			36 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Stockholders Equity Note [Line Items]
Anti-dilutive securities excluded from determination of diluted earnings per common share	600,000	100,000	100,000
Restricted stock units granted	727,000	642,000
Restricted stock units forfeited	163,000	96,000
Outstanding restricted stock units	1,522,000	1,545,000	1,248,000	1,545,000
Outstanding exercisable stock options		0	31,500	0
Stock options granted	0		0	0
Stock options exercised	0	29,750	19,525
Stock options exercised, aggregate intrinsic value	$ 0.0	$ 2.0	$ 1.1
Restricted Stock
Stockholders Equity Note [Line Items]
Share based compensation	28.7	28.1	23.0
Unrecognized compensation cost	$ 71.1	$ 59.9	$ 53.6	$ 59.9
Restricted Stock | Minimum
Stockholders Equity Note [Line Items]
Restricted stock and restricted stock unit grants, vesting period	3 years
Restricted Stock | Maximum
Stockholders Equity Note [Line Items]
Restricted stock and restricted stock unit grants, vesting period	4 years
Restricted Stock | Deferred Compensation Plan
Stockholders Equity Note [Line Items]
Restricted stock units granted	7,146	16,148	12,081
Restricted stock units forfeited	2,444
Weighted average remaining vesting period	2 years 6 months 4 days
Outstanding restricted stock units	14,544
Time And Performance Based Restricted Stock
Stockholders Equity Note [Line Items]
Restricted stock units granted	243,840
Restricted stock units forfeited	0
Weighted average remaining vesting period	3 years 1 month 6 days
Outstanding restricted stock units	245,440