OTHER INTANGIBLE ASSETS (NARRATIVE) (DETAILS) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OTHER INTANGIBLE ASSETS [Abstract]
Amortization expense related to intangible assets									$ 9,600,000	$ 7,200,000	$ 3,700,000
Weighted Average Useful Life [Line Items]
Impairment losses	$ 373,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 1,205,000	$ 0	$ 373,000	$ 1,205,000	$ 2,958,000
Customer Strategy Services [Member]
Weighted Average Useful Life [Line Items]
Estimated royalty rate							6.00%
Growth rate							7.00%
Customer relationships
Weighted Average Useful Life [Line Items]
Weighted average useful life of intangible assets									8 years 4 months 0 days
Other intangible assets
Weighted Average Useful Life [Line Items]
Weighted average useful life of intangible assets									3 years 7 months 0 days