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Capitalized Software Costs (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Capitalized software development costs      
Gross carrying amount $ 100,455 $ 94,676  
Accumulated amortization (61,303) (54,895)  
Net capitalized software costs $ 39,152 $ 39,781 $ 19,994