Stock-Based Compensation Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Mar. 31, 2013
Number of Stock Options
Options outstanding at beginning of period (shares)	193,182
Exercised (shares)	(8,600)
Forfeited/expired (shares)	(155,990)
Options outstanding at end of period (shares)	28,592
Vested at end of period (shares)	28,592
Options exercisable at end of period (shares)	28,592
Weighted-Average Remaining Contractual Term
Options outstanding at end of period	9 months
Vested at end of period	9 months
Options exercisable at end of period	9 months
Weighted Average Exercise Price
Options outstanding at beginning of period (USD per share)	$ 13.11
Exercised (USD per share)	$ 7.75
Forfeited/expired (USD per share)	$ 13.33
Options outstanding at end of year (USD per share)	$ 13.50
Vested at end of period (USD per share)	$ 13.50
Options exercisable at end of period (USD per share)	$ 13.50
Aggregate Intrinsic Value
Options outstanding at end of period	$ 7
Vested at end of period	7
Options exercisable at end of period	$ 7