Summary of Significant Accounting Policies (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Dilutive effect of the Company's stock options
Net Income	$ 2,441	$ 2,064	$ 5,351	$ 5,265
Weighted-average common shares outstanding (basic)	5,328	5,276	5,311	5,267
Weighted-average common shares outstanding (diluted)	5,353	5,325	5,343	5,311
Net income per share - basic	$ 0.46	$ 0.39	$ 1.01	$ 1.00
Net income per share - diluted	$ 0.46	$ 0.39	$ 1.00	$ 0.99
Stock options [Member]
Dilutive effect of the Company's stock options
Weighted-average common shares outstanding (basic)	12	44	19	39
Restricted shares [Member]
Dilutive effect of the Company's stock options
Weighted-average common shares outstanding (basic)	6	5	6	5
Performance shares [Member]
Dilutive effect of the Company's stock options
Weighted-average common shares outstanding (basic)	7	0	7	0