Net Income Per Share Data - Denominator for Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net income from continuing operations available to common shareholders	$ 3,924	$ 3,674	$ 10,590	$ 9,763
Basic weighted average shares outstanding	13,002	13,585	13,057	13,639
Dilutive effect of outstanding stock options, non-vested restricted stock, restricted stock units, deferred stock units and performance shares	277	228	267	252
Diluted weighted average shares outstanding	13,279	13,813	13,324	13,891