Earnings Per Share ("EPS") and Cash Dividends - Summary of Basic EPS and Diluted EPS Calculations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share Diluted [Line Items]
Net income	$ 4,259	$ 3,842
Basic shares	13,372	13,189
Diluted shares	13,563	13,345
Basic EPS	$ 0.32	$ 0.29
Diluted EPS	$ 0.31	$ 0.29
Stock Options
Earnings Per Share Diluted [Line Items]
Incremental shares from the assumed exercise of outstanding stock options and lapse of restrictions on restricted stock awards	120	101
Restricted Stock
Earnings Per Share Diluted [Line Items]
Incremental shares from the assumed exercise of outstanding stock options and lapse of restrictions on restricted stock awards	71	55