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SHARE-BASED COMPENSATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
SHARE-BASED COMPENSATION
Share-based compensation expense	$ 1,539	$ 1,854
Income tax benefit	(654)	(809)
Total share-based compensation expense, net of tax	885	1,045
Direct cost of services
SHARE-BASED COMPENSATION
Share-based compensation expense	19	89
Selling, general and administrative
SHARE-BASED COMPENSATION
Share-based compensation expense	$ 1,520	$ 1,765

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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