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Summary of Significant Accounting Policies - Schedule of Carrying Amount and Fair Value (Detail) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | --- | ---
Assets |  |  |  |  |
Cash and cash equivalents, Carrying Amount | $ 6,587 |  | $ 9,316 |  | $ 7,645
Restricted cash, Carrying Amount | 8,960 |  | 6,729 |  |
Derivative assets, Carrying Amount | 982 |  | 8,307 |  |
Cash and cash equivalents, Estimated Fair Value | 6,587 |  | 9,316 |  |
Restricted cash, Estimated Fair Value | 8,960 |  | 6,729 |  |
Derivative assets, Estimated Fair Value | 982 |  | 8,307 |  |
Liabilities |  |  |  |  |
Indebtedness, net of unamortized discount and deferred financing costs | 979,330 |  | 985,488 |  |
Derivative liabilities, carrying Amount | 12,415 |  |  |  |
Derivative liabilities, Estimated Fair Value | 12,415 |  |  |  |
Unsecured Credit Facility |  |  |  |  |
Liabilities |  |  |  |  |
Indebtedness, net of unamortized discount and deferred financing costs | 153,915 | [1] | 153,983 | [2] |
Indebtedness, net of unamortized discount and deferred financing costs, estimated fair value | 156,303 |  | 155,743 |  |
Term Loans |  |  |  |  |
Liabilities |  |  |  |  |
Indebtedness, net of unamortized discount and deferred financing costs | 298,594 |  | 248,380 |  |
Indebtedness, net of unamortized discount and deferred financing costs, estimated fair value | 300,000 |  | 250,000 |  |
Mortgages |  |  |  |  |
Liabilities |  |  |  |  |
Indebtedness, net of unamortized discount and deferred financing costs | 526,821 |  | 583,125 |  |
Indebtedness, net of unamortized discount and deferred financing costs, estimated fair value | $ 528,140 |  | $ 577,112 |  |
[1] | The total capacity under the unsecured credit facility is $350,000, of which $156,303 was outstanding as of September 30, 2019.
[2] | The total capacity under the unsecured credit facility was $300,000, of which $155,743 was outstanding as of December 31, 2018.

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