Subsequent Events (Details) (USD $)
2 Months Ended 11 Months Ended 2 Months Ended 11 Months Ended 11 Months Ended 2 Months Ended 13 Months Ended 11 Months Ended
Mar. 06, 2014
Dec. 31, 2013
property
sqft
Mar. 06, 2014
Subsequent Event [Member]
sqft
property
Dec. 31, 2013
Subsequent Event [Member]
Feb. 28, 2014
Subsequent Event [Member]
Dec. 31, 2013
Common Stock [Member]
Apr. 04, 2013
Common Stock [Member]
Feb. 28, 2014
Common Stock [Member]
Subsequent Event [Member]
Feb. 28, 2014
Common Stock [Member]
Subsequent Event [Member]
Dec. 31, 2013
Common Stock [Member]
Dec. 31, 2013
Total Portfolio, As of Document End Date [Member]
sqft
property
Mar. 06, 2014
Total Portfolio, End of Subsequent Events Period [Member]
Subsequent Event [Member]
property
sqft
Mar. 06, 2014
Securities Sold [Member]
Dec. 31, 2013
Securities Sold [Member]
Subsequent Event [Line Items]                            
Common stock, outstanding   62,985,937     63,400,000                  
Proceeds from issuances of common stock   $ 1,537,164,000   $ 1,600,000,000   $ 1,600,000,000                
Common Stock, Value, Outstanding   1,600,000,000     1,600,000,000                  
Share Price           $ 25.00 $ 25.00 $ 25.00 $ 25.00          
Share Price, Dividend Reinvestment Plan           $ 23.75 $ 23.75 $ 23.75 $ 23.75          
Issuances of common stock   1,537,291,000       1,557,511,000   10,351,000 1,567,862,000 621,000        
Number of Real Estate Properties   239                 239 288    
Real Estate Investment, Aggregate Purchase Price   1,100,000,000                 1,146,141,000 [1] 1,437,181,000 [1]    
Area of Real Estate Property   7,500,000                 7,473,631 10,814,184    
Number of Businesses Acquired   239 49                      
Acquisitions, Purchase Price   1,016,599,000 291,040,000 [1]                      
Area of Real Estate Property, Acquisitions     3,340,553                      
Mortgages Assumed In Real Estate Acquisitions 107,300,000                          
Available-for-sale Equity Securities, Amortized Cost Basis   65,547,000                     7,300,000 400,000
Gain (Loss) on Sale of Securities, Net $ 200,000 $ 100,000                        
[1] Contract purchase price, excluding acquisition related costs.