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Real Estate and Accumulated Depreciation
12 Months Ended
Dec. 31, 2012
Real Estate And Accumulated Depreciation Disclosure  
Real Estate and Accumulated Depreciation Disclosure
Description (1) Encumbrances (2) Initial cost to company Cost capitalized subsequent to acquisition Gross amount at which carried at close of period (4) Accumulated depreciation Date of construction Date acquired Life on which depreciation in latest income statements is computed
54,604 sites  2,120,804 (3) (3)  8,316,547  (2,968,230) Various Various Up to 20 years
                   
(1)No single site exceeds 5% of the aggregate gross amounts at which the assets were carried at the close of the period set forth in the table above.
(2)Certain assets secure debt of approximately $2.1 billion.
(3)The Company has omitted this information, as it would be impracticable to compile such information on a site-by-site basis.
(4)Does not include sites under construction accounts.

Gross amount at which carried at January 1, 2012    7,192,641
        
Additions during period:    
 Acquisitions through foreclosure  0  
 Other acquisitions (1)  739,144  
 Discretionary capital projects (2)  217,935  
 Discretionary ground lease purchases (3)  93,990  
 Redevelopment capital expenditures (4)  67,309  
 Capital improvements (5)  70,453  
 Other (6)  30,813  
Total additions    1,219,644
        
Deductions during period:    
 Cost of real estate sold or disposed  (15,288)  
 Other (7)  (80,450)  
Total deductions:    (95,738)
        
Balance at December 31, 2012    8,316,547
        
(1)Other acquisitions include acquisitions of sites.
(2)Discretionary capital projects include amounts incurred primarily for the construction of new sites.
(3)Discretionary ground lease purchases include amounts incurred to purchase or otherwise secure the land under communications sites.
(4)Redevelopment capital expenditures include amounts incurred to increase the capacity of existing sites, which results in new incremental tenant revenue.
(5)Capital improvements include amounts incurred to maintain existing sites.
(6)Primarily includes asset retirement obligations and regional improvements
(7)Primarily includes foreign currency exchange rate fluctuations.

Gross amount of accumulated depreciation at January 1, 2012    (2,646,927)
      
Additions during period:    
 Depreciation  (344,778)  
 Other  (253)  
Total additions    (345,031)
      
Deductions during period:    
 Amount of accumulated depreciation for assets sold or disposed  10,920  
 Other  12,808  
Total deductions    23,728
      
Balance at December 31, 2012    (2,968,230)