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STOCK-BASED COMPENSATION (Details) (USD $)	3 Months Ended		9 Months Ended
STOCK-BASED COMPENSATION (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Information related to share based awards
Total stock-based compensation expense	$ 4,400,000	$ 3,100,000	$ 14,300,000	$ 14,800,000
Deferred income tax benefit	1,800,000	1,200,000	5,700,000	5,900,000
Stock-based compensation cost capitalized	0	0	0	0
Stock Options
Information related to share based awards
Total stock-based compensation expense	500,000	500,000	1,400,000	1,500,000
Performance Stock Rights
Information related to share based awards
Total stock-based compensation expense	1,200,000	500,000	4,400,000	4,800,000
Restricted Share Units
Information related to share based awards
Total stock-based compensation expense	2,500,000	2,100,000	7,800,000	7,500,000
Nonemployee Director Deferred Stock Units
Information related to share based awards
Total stock-based compensation expense	$ 200,000	$ 0	$ 700,000	$ 1,000,000

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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