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Composition of Certain Financial Statement Captions - Property and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Sep. 30, 2016
Property and equipment:    
Data processing equipment and software $ 88,830 $ 84,761
Office furniture and equipment 20,763 16,847
Leasehold improvements 25,767 25,152
Less: accumulated depreciation and amortization (94,657) (81,638)
Total $ 40,703 $ 45,122