Impairment of Long-Lived Assets (Details Textual) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Impairment of Long-Lived Assets (Textual) [Abstract]
Lease period of fee owned properties	20 years
Fair value of long lived assets in the multiples of cash flow	Six and a half times for the evaluations performed	Six and a half times for the evaluations performed
The estimated aggregate fair value of the long-lived assets	$ 0

A description of how an entity determined the fair value of the long-lived asset they are holding and using, for example, whether based on a quoted market price, prices for similar assets, or another valuation technique.

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section CC

-Subsection 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 26

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration