Shares Used to Compute Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Schedule Of Computation Of Basic And Diluted Earnings Per Common Share [Line Items]
Income from continuing operations	$ 8,372	$ 4,882	$ 12,284	$ 6,154
Basic weighted-average shares	7,816,000	7,556,000	7,739,000	7,548,000
Diluted:
Weighted-average shares, basic	7,816,000	7,556,000	7,739,000	7,548,000
Weighted-average shares, diluted	8,132,000	7,661,000	8,031,000	7,635,000
Basic earnings per share from continuing operations	$ 1.07	$ 0.65	$ 1.59	$ 0.82
Diluted earnings per share from continuing operations	$ 1.03	$ 0.64	$ 1.53	$ 0.81
Stock Option
Diluted:
Dilutive effect of stock	275,000	72,000	257,000	64,000
Restricted Stock
Diluted:
Dilutive effect of stock	41,000	33,000	35,000	23,000