Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Mar. 31, 2012 Year
Number of Stock Options
Options outstanding at beginning of period	370,137
Exercised	(13,320)
Forfeited/expired	(131,135)
Options outstanding at end of period	225,682
Vested at end of period	225,682
Options exercisable at end of period	225,682
Weighted Average Remaining Contractual Term
Options outstanding at end of period	0.8
Vested at end of period	0.8
Options exercisable at end of period	0.8
Weighted Average Exercise Price
Options outstanding at beginning of period	$ 14.57
Exercised	$ 7.75
Forfeited/expired	$ 17.35
Options outstanding at end of year	$ 13.35
Vested at end of period	$ 13.35
Options exercisable at end of period	$ 13.35
Aggregate Intrinsic Value
Options outstanding at end of period	$ 61
Vested at end of period	61
Options exercisable at end of period	$ 61