Intangible Assets (Details Textual)	3 Months Ended
	Mar. 31, 2013
Favorable Lease Agreements [Member] | Maximum [Member]
Intangible Assets Textual [Abstract]
Amortized over the lives of the leases term range	26 years
Favorable Lease Agreements [Member] | Minimum [Member]
Intangible Assets Textual [Abstract]
Amortized over the lives of the leases term range	4 years
Other Intangible Assets [Member] | Maximum [Member]
Intangible Assets Textual [Abstract]
Amortized over the lives of the leases term range	11 years
Other Intangible Assets [Member] | Minimum [Member]
Intangible Assets Textual [Abstract]
Amortized over the lives of the leases term range	1 year