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Summary of Significant Accounting Policies - Schedule of Carrying Amount and Fair Value (Detail) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Assets |  |  |  |  |  |
Cash and cash equivalents, Carrying Amount | $ 28,051 |  | $ 38,301 |  | $ 21,568 | $ 14,763
Restricted cash, Carrying Amount | 6,779 |  | 5,413 |  |  |
Derivative assets, Carrying Amount |  |  | 24 |  |  |
Cash and cash equivalents, Estimated Fair Value | 28,051 |  | 38,301 |  |  |
Restricted cash, Estimated Fair Value | 6,779 |  | 5,413 |  |  |
Derivative assets, Estimated Fair Value |  |  | 24 |  |  |
Liabilities |  |  |  |  |  |
Indebtedness, net of unamortized discount and deferred financing costs | 880,288 |  | 966,611 |  |  |
Derivative liabilities, Carrying Amount | 1,163 |  |  |  |  |
Derivative liabilities, Estimated Fair Value | 1,163 |  |  |  |  |
Mortgages |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Indebtedness, net of unamortized discount and deferred financing costs | 597,125 |  | 581,038 |  |  |
Indebtedness, net of unamortized discount and deferred financing costs, estimated fair value | 629,876 |  | 589,320 |  |  |
Secured Credit Facility |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Indebtedness, net of unamortized discount and deferred financing costs | 243,604 | [1],[2] | 267,155 | [3] |  |
Indebtedness, net of unamortized discount and deferred financing costs, estimated fair value | 247,335 |  | 271,500 |  |  |
Term Loan |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Indebtedness, net of unamortized discount and deferred financing costs | 39,559 | [1] | 118,418 |  |  |
Indebtedness, net of unamortized discount and deferred financing costs, estimated fair value | $ 40,000 |  | $ 120,000 |  |  |
[1] | As of June 30, 2016, IRT maintained a float-to-fixed interest rate swap with a $ 150,000 notional amount. This swap, which expires on June 17, 2021 and has a fixed rate of 1.145%, has converted $ 150,000 of our floating rate debt to fixed rate debt.
[2] | The secured credit facility total capacity is $325,000, of which $247,335 was outstanding as of June 30, 2016.
[3] | The secured credit facility total capacity was $325,000, of which $271,500 was outstanding as of December 31, 2015.

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