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Property and Equipment - Land Sales (Details) (USD $)
1 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Abstract]      
Deferred revenue recognized from prior land sale   $ 648,000  
Land sale, sale price 4,988,000    
Land sale revenue     4,340,000
Gain on land sale   4,058,000  
Deferred land sale revenue $ 648,000   $ 648,000