Sale of Real Estate (Details Textual) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
Jun. 30, 2012	Jan. 31, 2012 Parcel	Jun. 30, 2011 Parcel	Dec. 31, 2012	Dec. 31, 2011
Sale of Real Estate (Textual) [Abstract]
Number of real estate parcels sold		2	2
Received in pre-tax net proceed of sale of real estate parcel	$ 253	$ 570	$ 4,200	$ 825	$ 4,164
Gain on sale of real estate, net		$ 164	$ 4,100	$ 164	$ 4,089

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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