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CUSTOMER CONTRACTS AND OTHER INTANGIBLE ASSETS (Details 2) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Estimated amortization expense for the existing carrying amount of customer contracts and other intangible assets  
2014 $ 22,630
2015 19,978
2016 17,211
2017 15,582
2018 $ 12,094