Discontinued Operations - Operating Results from Discontinued Operations (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
Discontinued Operations And Disposal Groups [Abstract]
Total revenue				$ 5,311
Income from discontinued operations	136		1,151	2,309
Income tax provision	(183)	(30)	(516)	(1,078)
(Loss) income from discontinued operations, net of income taxes	(47)	(30)	635	1,231
Loss on sale of discontinued operations		(57)		(1,691)
Income tax (provision) benefit		(25)		676
Loss on sale of discontinued operations, net of income taxes		$ (82)		$ (1,015)