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Intangible Assets (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Goodwill And Intangible Assets [Line Items]            
Amortization     $ 1,878 $ 1,704 $ 5,640 $ 8,453
Reduction in internal use software $ 1,874          
Customer relationships            
Goodwill And Intangible Assets [Line Items]            
Amortization of intangibles   $ 2,404