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Borrowings - Summary of Borrowings (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Debt Instrument [Line Items] |  |
Total borrowings, net | $ 240,770 | $ 207,347
Mortgage notes and bonds payable |  |
Debt Instrument [Line Items] |  |
Total mortgage notes and bonds payable | 222,378 | 192,209
Deferred financing costs – mortgage notes and bonds payable | (1,658) | (1,412)
Total borrowings, net | 220,720 | 190,797
MetLife Term Notes | Fixed-rate mortgage notes payable |  |
Debt Instrument [Line Items] |  |
Total mortgage notes and bonds payable | $ 140,857 | 142,861
MetLife Term Notes | Fixed-rate mortgage notes payable | Minimum |  |
Debt Instrument [Line Items] |  |
Stated interest rate (as percent) | 2.90% |
MetLife Term Notes | Fixed-rate mortgage notes payable | Maximum |  |
Debt Instrument [Line Items] |  |
Stated interest rate (as percent) | 3.94% |
MetLife Term Notes | Fixed-rate mortgage notes payable | Weighted average |  |
Debt Instrument [Line Items] |  |
Stated interest rate (as percent) | 3.26% |
Bonds payable | Fixed-rate bonds payable |  |
Debt Instrument [Line Items] |  |
Total mortgage notes and bonds payable | $ 81,521 | 49,348
Bonds payable | Fixed-rate bonds payable | Minimum |  |
Debt Instrument [Line Items] |  |
Stated interest rate (as percent) | 2.38% |
Bonds payable | Fixed-rate bonds payable | Maximum |  |
Debt Instrument [Line Items] |  |
Stated interest rate (as percent) | 3.63% |
Bonds payable | Fixed-rate bonds payable | Weighted average |  |
Debt Instrument [Line Items] |  |
Stated interest rate (as percent) | 3.10% |
MetLife Lines of Credit | Variable-rate revolving lines of credit |  |
Debt Instrument [Line Items] |  |
Stated interest rate (as percent) | 3.26% |
MetLife Lines of Credit | Variable-rate revolving lines of credit | Revolving credit facility |  |
Debt Instrument [Line Items] |  |
Total borrowings, net | $ 20,050 | $ 16,550

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