Summary of Stock Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Mar. 31, 2015 Years	Sep. 30, 2014 Years
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options outstanding at October 1, 2014	326,830
Options granted	39,425
Options forfeited	6,000
Options exercised	51,300
Spin-off conversion	17,795
Options outstanding at March 31, 2015	326,750
Options outstanding weighted average exercise price-beginning balance	$ 25.43
Options outstanding weighted average exercise price - Granted	$ 26.97
Options outstanding weighted average exercise price - forfeited	$ 14.97
Options outstanding weighted average exercise price - Exercised	$ 13.27
Options outstanding weighted average exercise price - Spin-off conversion	$ 20.63
Options outstanding weighted average exercise price - Ending balance	$ 21.35
Options outstanding weighted average remaining term	6.0	5.0
Options outstanding weighted average grant date fair value - beginning balance	$ 3,481
Options granted weighted average grant date fair value	432
Options forfeited weighted average grant date fair value	(35)
Options exercised weighted average grant date fair value	(297)
Options Spin-off adjustment weighted average grant date fair value	(865)
Options Spin-off conversion weighted average grant date fair value	155
Options outstanding weighted average grant date fair value - ending balance	2,871
Options exercisable at March 31, 2015	234,847
Options exerciseable weighted average exercise price	$ 20.21
Options exerciseable weighted average remaining term	5.1
Options exerciseable weighted average grant date fair value	1,884
Options vested during six months ended March 31, 2015	37,546
Options vested weighted average grant date fair value	$ 329