Reclassifications - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
Mar. 31, 2013	Mar. 31, 2013
Disclosure Reclassifications Additional Information [Abstract]
Pre-tax gain from sale of assets	$ (27,000)	$ 600,000
Prior Period Reclassification Adjustment		$ 700,000

The net gain (loss) resulting from the sale, transfer, termination, or other disposition of assets during the period, excluding transactions involving capital leases, assets-held- or available-for-lease, and other real estate owned which, to the extent appropriate, are included in gains (losses) on the disposition of assets in nonoperating income (expense).

No definition available.

Name:	us-gaap_GainsLossesOnSalesOfAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration