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Related Party Transactions (Details) (USD $)
3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
SIGI
Jun. 30, 2012
SIGI
Jun. 30, 2013
Pluris, LLC
Jun. 30, 2012
Pluris, LLC
Dec. 31, 2010
Pluris, LLC
Jun. 30, 2013
Roger Newnham
Jun. 30, 2012
Roger Newnham
Jun. 30, 2013
Lemmie Rockford
Jun. 30, 2012
Lemmie Rockford
Jun. 30, 2013
Quality RE Partners
item
Related party transactions                            
Lease payments to related party $ 398,000 $ 323,000 $ 797,000 $ 648,000 $ 471,000 $ 462,000       $ 150,000 $ 141,000 $ 45,000 $ 45,000 $ 132,000
Amount of agreement to construct a wastewater facility                 6,100,000          
Related party revenues recognized             $ 0 $ 355,000            
Number of former shareholders owning leased property                           3
Number of current employees owning leased property                           2