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INCOME TAXES (Details) (USD $)	3 Months Ended
INCOME TAXES (Details) (USD $)	Mar. 31, 2013
Gross unrecognized tax benefits, roll forward
Balance at the beginning of the period	$ 926,000
Additions for tax positions related to the prior year	397,000
Balance at the end of the period	1,323,000
Accrued interest and penalties related to unrecognized tax benefits	$ 400,000

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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