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STOCK COMPENSATION Total Stock Based Compensation Expense and the Tax Related Benefit (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
STOCK COMPENSATION [Abstract]
Stock option expense	$ 2,381	$ 2,338
RSU expense	1,546	2,051
Total stock based compensation expense	3,927	4,389
Total related tax benefit	$ 1,231	$ 1,253

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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- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

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