Debt - Schedule of Debt Maturities (Footnote) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Loan
Jun. 30, 2014
USD ($)
Debt Instrument [Line Items]      
Capitalized interest   $ 3,551,000 $ 0
CMBS Loans      
Debt Instrument [Line Items]      
Debt default amount $ 25,400,000 25,400,000  
Capitalized interest 400,000    
Mortgages and Notes Payable      
Debt Instrument [Line Items]      
Debt default amount 79,000,000 79,000,000  
Capitalized interest   5,700,000  
Stated maturity in 2015 109,178,000 109,178,000  
Stated maturity in 2017 825,779,000 $ 825,779,000  
Mortgages | CMBS Loans      
Debt Instrument [Line Items]      
Number of CMBS loans in default | Loan   4  
Stated maturity in 2015 25,284,000 $ 25,284,000  
Stated maturity in 2017 $ 53,707,000 $ 53,707,000