STOCKHOLDERS' EQUITY (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended			36 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Stockholders Equity Note [Line Items]
Anti-dilutive securities excluded from determination of diluted earnings per common share	100,000	100,000	300,000
Restricted stock units granted	642,000	342,000
Restricted stock units forfeited	96,000	95,000
Outstanding restricted stock units	1,545,000	1,248,000	1,646,000	1,545,000
Outstanding exercisable stock options	0	31,500	51,000	0
Stock options granted				0
Stock options exercised	29,750	19,525	45,040
Stock options exercised, aggregate intrinsic value	$ 2.0	$ 1.1	$ 1.7
Stock options outstanding, aggregate intrinsic value	0			0
Restricted Stock
Stockholders Equity Note [Line Items]
Share based compensation	28.1	23.0	23.4
Unrecognized compensation cost	$ 59.9	$ 53.6	$ 50.4	$ 59.9
Restricted Stock | Maximum
Stockholders Equity Note [Line Items]
Restricted stock and restricted stock unit grants, vesting period	4 years
Restricted Stock Unit
Stockholders Equity Note [Line Items]
Restricted stock units granted	14,342	12,081
Restricted stock units forfeited	0
Weighted average remaining vesting period	2 years 9 months 7 days
Outstanding restricted stock units	14,342			14,342