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Goodwill and Other Intangible Assets (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Customer contracts and relationships      
Amortization expense $ 10,543 $ 11,311 $ 13,675
Estimated future amortization expense      
March 31, 2015 23,633    
March 31, 2016 5,977    
March 31, 2017 7,513    
March 31, 2018 3,558    
March 31, 2019 and thereafter $ 6,511    
Minimum
     
Customer contracts and relationships      
Term of contracts 1 year    
Maximum
     
Customer contracts and relationships      
Term of contracts 15 years