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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]      
Maturity of liquid investments three months or less    
Minimum percentage of taxable income to be distributed 90.00%    
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]      
Real Estate Tax Expense   $ 7,517 $ 7,734
Restricted Cash $ 131,598 7,271  
Prepayments of Penalties Associated with Retirement of Debt 0 0 1,453
Operating Lease Right-of-Use Assets 24,877 0  
Operating Lease Liabilities 22,369 0  
In-Place Leases and Tenant Relationships      
Finite-Lived Intangible Assets [Line Items]      
Amortization of Intangible Assets 6,303 6,267 6,648
Above and Below Market Leases      
Finite-Lived Intangible Assets [Line Items]      
Amortization of Intangible Assets $ 1,281 $ 1,095 $ 1,116