Income Tax Provision (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Current income tax provision:
U.S. federal	$ 1,056	$ 638	$ 1,893	$ 1,592
U.S. state and local	80	144	245	321
Non-U.S	57	9	96	46
Total current tax provision	1,193	791	2,234	1,959
Deferred income tax provision (benefit):
U.S. federal	(88)	40	(98)	31
U.S state and local	(2)	0	(2)	0
Total deferred tax provision (benefit)	(90)	40	(100)	31
Income tax provision	$ 1,103	$ 831	$ 2,134	$ 1,990