Income Per Share Data - Components of Basic and Diluted Income Per Share Computation (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Net income from continuing operations available to common shareholders	$ 2,459	$ 3,420	$ 6,089	$ 7,668
Basic weighted average shares outstanding	13,538	14,622	13,658	14,639
Dilutive effect of outstanding stock options, non-vested restricted stock, restricted stock units and performance shares	286	292	267	232
Diluted weighted average shares outstanding	13,824	14,914	13,925	14,871