Dilutive Effect of Company's Stock Options Restricted Shares and Performance Shares (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Income from continuing operations	$ 2,557	$ 2,102	$ 4,947	$ 4,387
Income (loss) from discontinued operations, net of tax	(79)	339	2,381	964
Net income	$ 2,478	$ 2,441	$ 7,328	$ 5,351
Weighted-average common shares outstanding (basic) (in shares)	5,374	5,328	5,359	5,311
Weighted-average common shares outstanding (diluted) (in shares)	5,402	5,353	5,399	5,343
Net income per share – basic
Continuing operations (in dollars per share)	$ 0.47	$ 0.40	$ 0.92	$ 0.83
Discontinued operations (in dollars per share)	$ (0.01)	$ 0.06	$ 0.44	$ 0.18
Net income (in dollars per share)	$ 0.46	$ 0.46	$ 1.36	$ 1.01
Net income per share – diluted:
Continuing operations (in dollars per share)	$ 0.47	$ 0.40	$ 0.92	$ 0.82
Discontinued operations (in dollars per share)	$ (0.01)	$ 0.06	$ 0.44	$ 0.18
Net income (in dollars per share)	$ 0.46	$ 0.46	$ 1.36	$ 1.00
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	18	147	58	147
Stock options
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	1	12	1	19
Restricted shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	14	6	10	6
Performance shares
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Effect of dilutive securities (in shares)	13	7	29	7