Employee Benefit Plans Components of Net Pension Cost (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 102	$ 139	$ 304	$ 461
Interest cost	40	34	118	114
Amortization of losses	0	1	1	4
Expected return on assets	(53)	(55)	(161)	(190)
Net periodic pension cost	89	119	262	389
Settlement loss	0	0	0	87
Total pension cost	$ 89	$ 119	$ 262	$ 476