GOODWILL AND OTHER INTANGIBLE ASSETS (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of amortized intangible assets
Gross Carrying Amount	$ 339,355,000	$ 302,544,000
Accumulated Amortization	(116,880,000)	(102,428,000)
Amortization expense for intangible assets	18,100,000	18,900,000	9,300,000
Estimated amortization expense
2012	18,400,000
2013	17,800,000
2014	16,600,000
2015	16,600,000
2016	16,600,000
Contract based
Components of amortized intangible assets
Gross Carrying Amount	20,793,000	15,447,000
Accumulated Amortization	(13,571,000)	(12,468,000)
Technology based
Components of amortized intangible assets
Gross Carrying Amount	91,269,000	92,149,000
Accumulated Amortization	(35,287,000)	(29,629,000)
Marketing related
Components of amortized intangible assets
Gross Carrying Amount	26,304,000	26,833,000
Accumulated Amortization	(13,868,000)	(13,253,000)
Customer based
Components of amortized intangible assets
Gross Carrying Amount	200,989,000	168,115,000
Accumulated Amortization	$ (54,154,000)	$ (47,078,000)