Summary of Stock Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2014 Years	Sep. 30, 2014 Years
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options outstanding at October 1, 2014	326,830
Options granted	37,385
Options forfeited	6,000
Options exercised	15,300
Options outstanding at December 31, 2014	342,915
Options outstanding weighted average exercise price-beginning balance	$ 25.43
Options outstanding weighted average exercise price - Granted	$ 35.89
Options outstanding weighted average exercise price - forfeited	$ 14.97
Options outstanding weighted average exercise price - Exercised	$ 16.42
Options outstanding weighted average exercise price - Ending balance	$ 27.15
Options outstanding weighted average remaining term	5.6	5.0
Options outstanding weighted average grant date fair value - beginning balance	$ 3,481
Options granted weighted average grant date fair value	542
Options forfeited weighted average grant date fair value	(47)
Options exercised weighted average grant date fair value	(119)
Options outstanding weighted average grant date fair value - ending balance	3,857
Options exercisable at December 31, 2014	258,257
Options exerciseable weighted average exercise price	$ 25.43
Options exerciseable weighted average remaining term	4.6
Options exerciseable weighted average grant date fair value	2,642
Options vested during three months ended December 31, 2014	35,081
Options vested weighted average grant date fair value	$ 409