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Summary of Significant Accounting Policies - Revenues - Accounts Receivables (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) joint_venture | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Tenant Receivables | $ 15,599 | $ 14,521 |
Document Fiscal Year Focus | 2016 |  |
Current Fiscal Year End Date | --12-31 |  |
Number of Joint Ventures, Unilateral Dissolution Right | joint_venture | 5 |  |
Provision for doubtful accounts | $ 1,705 | 2,364 | $ 2,192
Provision for Loan and Lease Losses | 2,271 | 714 | $ 107
Accrued CAM, insurance and tax reimbursements receivables | 9,221 | 12,358 |
Other receivables | 12,058 | 10,708 |
Straight Line Rent Receivable, Gross | 73,384 | 64,757 |
COMBINED ABOVE-Notes receivable (note 5) | 10,481 | 10,480 |
Less: allowance for doubtful accounts | (5,460) | (5,295) |
Straight line rent receivable reserve | (3,561) | (1,365) |
Accounts Receivable, Net | $ 111,722 | $ 106,164 |
Percentage Of Revenue By Customer | 5.00% |  |
Maximum [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage Of Revenue By Customer | 5.00% |  |

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