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STOCK-BASED COMPENSATION 1999 Stock Option Plan and 2002 Incentive Plan (Details)				0 Months Ended
	May 13, 1999 1999 Stock Option Plan [Member]	May 23, 2002 2002 Stock Incentive Plan [Member]	May 23, 2002 2002 Stock Plan [Member]	May 06, 2011 Amended and Restated 2002 Stock Plan [Member]	Dec. 31, 2011 Amended and Restated 2002 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance	5,000,000	10,000,000	15,000,000
Increased number of shares reserved for issuance				3,800,000
Shares available for future grant					10,451,861

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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