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Intangible Assets (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Goodwill And Intangible Assets [Line Items]        
Amortization $ 4,558 $ 345 $ 6,749 $ 689
Appia Core        
Goodwill And Intangible Assets [Line Items]        
Increase in intangible assets       17,780
Customer relationships        
Goodwill And Intangible Assets [Line Items]        
Amortization of intangibles 2,404      
Continuing Operations        
Goodwill And Intangible Assets [Line Items]        
Amortization $ 4,558 $ 345 $ 6,749 $ 689