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STOCK-BASED COMPENSATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Information related to share based awards
Total stock-based compensation expense	$ 1.4	$ 1.1	$ 4.8	$ 4.9
Deferred Income tax benefit	0.6	0.4	1.9	2.0
Stock-based compensation cost capitalized	0	0	0	0
Stock options
Information related to share based awards
Total stock-based compensation expense	0.2	0.2	0.5	0.4
Performance stock rights
Information related to share based awards
Total stock-based compensation expense	0.4	0.1	1.7	1.8
Restricted share units
Information related to share based awards
Total stock-based compensation expense	$ 0.8	$ 0.8	$ 2.6	$ 2.7

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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