Assets Held for Sale (Details Textual) (USD $)	12 Months Ended
Dec. 31, 2012
Assets Held for Sale (Textual) [Abstract]
Sale of assets	$ 4,081,000
Gain on sale of assets	$ 2,262,000

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