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RESTRUCTURING (Details) (USD $)	1 Months Ended	12 Months Ended
RESTRUCTURING (Details) (USD $)	Jan. 31, 2013 employee	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring and Related Activities [Abstract]
Number of positions eliminated	100
Restructuring cost		$ 6,300,000us-gaap_RestructuringCosts
Restructuring charges		$ 0us-gaap_RestructuringCharges	$ 4,490,000us-gaap_RestructuringCharges	$ 1,845,000us-gaap_RestructuringCharges

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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