Annual report pursuant to Section 13 and 15(d)

Unsecured Revolving Credit Facility (Narrative) (Details)

v2.4.0.8
Unsecured Revolving Credit Facility (Narrative) (Details) (USD $)
 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Unsecured Revolving Credit Facility [Member]
item
entity
Dec. 31, 2012
Unsecured Revolving Credit Facility [Member]
Dec. 31, 2013
Unsecured Revolving Credit Facility Extension 1 [Member]
Dec. 31, 2013
Unsecured Revolving Credit Facility Extension 2 [Member]
Jul. 15, 2013
Previous Unsecured Revolving Credit Facility [Member]
Dec. 31, 2013
Money Market Loan [Member]
Dec. 31, 2012
Money Market Loan [Member]
Dec. 31, 2013
Minimum [Member]
Unsecured Revolving Credit Facility [Member]
item
Dec. 31, 2013
Maximum [Member]
Unsecured Revolving Credit Facility [Member]
Dec. 31, 2013
Maximum [Member]
Money Market Loan [Member]
Line of Credit Facility [Line Items]                    
Number of lending institutions 17                  
Borrowing capacity under the credit facility $ 600,000,000       $ 600,000,000 $ 75,000,000        
Expandable borrowing capacity under the credit facility 1,000,000,000                  
Credit facility maturity date Jul. 01, 2017                  
Number of extension options 2                  
Credit facility, extension period 6 months                  
Credit facility extension fee, basis points     0.075% 0.075% 0.25%          
Line of credit facility, bid feature, current borrowing capacity 300,000,000                  
Leverage ratio                 60.00%  
Secured indebtedness                 40.00%  
Fixed charge coverage ratio               1.5    
Unsecured indebtedness                 60.00%  
Unencumbered property interest coverage               2.0    
Investment limitations as a percentage of total capitalization                 15.00%  
Terms of the unsecured facility The terms of the unsecured facility include certain restrictions and covenants which limit, among other things the incurrence of additional indebtedness, the incurrence of liens and the disposition of real estate properties (to the extent that: (i) such property dispositions cause the Company to default on any of the financial ratios of the facility described below, or (ii) the property dispositions are completed while the Company is under an event of default under the facility, unless, under certain circumstances, such disposition is being carried out to cure such default), and which require compliance with financial ratios relating to the maximum leverage ratio (60 percent), the maximum amount of secured indebtedness (40 percent), the minimum amount of fixed charge coverage (1.5 times), the maximum amount of unsecured indebtedness (60 percent), the minimum amount of unencumbered property interest coverage (2.0 times) and certain investment limitations (generally 15 percent of total capitalization).                  
Terms of dividend restriction If an event of default has occurred and is continuing, the Company will not make any excess distributions except to enable the Company to continue to qualify as a REIT under the Code.                  
Outstanding borrowings under the facility $ 0 $ 0       $ 0 $ 0      
Spread over LIBOR         1.25%          
Maturity period of the unsecured borrowing                   30 days