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Intangible Assets (Details 2) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Estimated amortization of intangible assets with determinable lives      
2015 $ 7,171    
2016 7,024    
2017 6,553    
2018 4,301    
2019 3,517    
2020 and beyond 4,450    
Net intangible assets $ 33,016 $ 27,550 $ 23,259