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Summary of Significant Accounting Policies - Accounts Receivable Net of Allowance for Uncollectable Tenant Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable $ 8,697 $ 22,008
Allowance for doubtful accounts (1,845) (1,012)
Accounts receivable, net 6,852 20,996
Straight-line rent receivables, net 87,281 58,783
Allowance for Straight-Line Receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Straight-line rent receivables 87,417 59,753
Allowance for doubtful accounts $ (136) $ (970)