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Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Summary of Significant Accounting Policies (Textual) [Abstract]      
Minimum percentage of adjusted taxable income to be distributed to shareholders as a real estate investment trust 90.00%    
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest $ 44,578 $ 26,208 $ 15,199
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 1,086 $ (300)  
Minimum [Member] | Land, Buildings and Improvements [Member]
     
Property, Plant and Equipment [Line Items]      
Estimated useful life (in years) 10 years    
Minimum [Member] | Furniture Fixtures And Equipment [Member]
     
Property, Plant and Equipment [Line Items]      
Estimated useful life (in years) 1 year    
Maximum [Member] | Land, Buildings and Improvements [Member]
     
Property, Plant and Equipment [Line Items]      
Estimated useful life (in years) 40 years    
Maximum [Member] | Furniture Fixtures And Equipment [Member]
     
Property, Plant and Equipment [Line Items]      
Estimated useful life (in years) 10 years