XML 119 R103.htm IDEA: XBRL DOCUMENT v3.10.0.1
Schedule III - Schedule of Real Estate and Accumulated Depreciation (Schedule of Real Estate and Accumulated Depreciation) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
USD ($)
site
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Description | site 29,578      
Encumbrances $ 7,428,000      
Gross Amount Carried at Close of Current Period 5,561,005 $ 5,340,858 $ 5,079,660 $ 4,839,874
Accumulated Depreciation at Close of Current Period $ (2,868,507) $ (2,627,841) $ (2,396,587) $ (2,160,530)
Date of Construction Various      
Date Acquired Various      
Secured debt $ 7,400,000      
Maximum [Member]        
Life on Which Depreciation in Latest Income Statement is Computed 20 years      
Minimum [Member] | Real Estate, Gross [Member]        
Concentration risk percentage 5.00%