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Composition of Certain Financial Statement Captions - Property and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Sep. 30, 2015
Property and equipment:    
Data processing equipment and software $ 84,761 $ 71,841
Office furniture and equipment 16,847 14,750
Leasehold improvements 25,152 23,269
Less: accumulated depreciation and amortization (81,638) (71,652)
Total $ 45,122 $ 38,208