Earnings Per Share Reconciliation of Numerator and Denominator of the basic and diluted earnings per share computation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Equity [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									337,000	240,000
Net income available to common stockholders	$ 3,626	$ 2,416	$ 5,905	$ 1,579	$ 2,198	$ 1,691	$ 3,449	$ 507	$ 13,526	$ 7,845
Basic weighted average number of common shares	16,857,000	16,856,000	16,844,000	16,765,000	16,760,000	16,753,000	16,729,000	16,634,000	16,813,000	16,716,000
Stock options									91,000	143,000
Diluted weighted average number of common shares	16,934,000	16,927,000	16,903,000	16,856,000	16,842,000	16,863,000	16,868,000	16,847,000	16,904,000	16,859,000
Basic earnings per share	$ 0.22	$ 0.14	$ 0.35	$ 0.09	$ 0.13	$ 0.10	$ 0.21	$ 0.03	$ 0.80	$ 0.47
Diluted earnings per share	$ 0.21	$ 0.14	$ 0.35	$ 0.09	$ 0.13	$ 0.10	$ 0.20	$ 0.03	$ 0.80	$ 0.47