Reconciliation of Numerator and Denominator of the basic and diluted earnings per share computation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income available to common stockholders	$ 7,249	$ 5,905	$ 9,832	$ 7,484
Basic weighted average shares	16,998	16,844	16,993	16,804
Stock options	45	59	48	79
Diluted weighted average shares	17,043	16,903	17,041	16,883
Basic earnings per share	$ 0.43	$ 0.35	$ 0.58	$ 0.45
Diluted earnings per share	$ 0.43	$ 0.35	$ 0.58	$ 0.44