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Discontinued Operations, Net of Tax (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Discontinued operations, Net of Tax      
Net gains (losses) on sales of real estate $ (15) $ 532 $ 78
Net operating losses (582) (690) (298)
Impairment losses (341) (887) (325)
Income tax benefit 115    
Discontinued operations, net of tax $ (823) $ (1,045) $ (545)