Annual report pursuant to Section 13 and 15(d)

Schedule III - Real Estate and Accumulated Depreciation (Details 2)

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Schedule III - Real Estate and Accumulated Depreciation (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Reconciliation of real estate accumulated depreciation      
Balance at beginning of period $ 53,784 $ 43,659 $ 34,112
Additions during period 11,946 10,125 9,547
Dispositions during period         
Balance at end of period $ 65,730 $ 53,784 $ 43,659