Property and Equipment and Other Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Property and equipment:
Data processing equipment and software	$ 124,699	$ 139,035
Office furniture and equipment	14,346	11,670
Leasehold improvements	25,503	24,117
Less: accumulated depreciation and amortization	(127,871)	(129,667)
Total	36,677	45,155
Other accrued liabilities:
Interest payable	8,392	8,519
Other	27,843	26,683
Total	$ 36,235	$ 35,202