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Capitalized Software Costs (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2013
Mar. 31, 2012
Capitalized software development costs        
Gross carrying amount $ 103,358 $ 100,455    
Accumulated amortization (64,906) (61,303)    
Net capitalized software costs $ 38,452 $ 39,152 $ 44,402 $ 39,781