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Summary of Information Concerning Indebtedness that Encumbered our Properties (Parenthetical) (Detail) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014
Centrepoint Apartments |  |
Mortgage Loans on Real Estate [Line Items] |  |
Interest payment period | Monthly |
Principal date | Feb. 01, 2015 | Feb. 01, 2015
Amortization schedule | 30 years | 30 years
Berkshire Square Apartments |  |
Mortgage Loans on Real Estate [Line Items] |  |
Interest payment period | Monthly |
Principal date | Feb. 01, 2016 | Feb. 01, 2016
Amortization schedule | 30 years | 30 years
OKC Portfolio |  |
Mortgage Loans on Real Estate [Line Items] |  |
Amortization schedule | 30 years | 30 years
Contractual interest rate | 5.60% | 5.60%
King's Landing |  |
Mortgage Loans on Real Estate [Line Items] |  |
Interest payment period | Monthly |
Principal date | Jun. 01, 2017 | Jun. 01, 2017
Amortization schedule | 30 years | 30 years
Belle Creek Apartments | Floating Rate |  |
Mortgage Loans on Real Estate [Line Items] |  |
Debt instrument interest rate | 2.25% | 2.25%
Belle Creek Apartments | 30-Day LIBOR |  |
Mortgage Loans on Real Estate [Line Items] |  |
Debt instrument interest rate | 0.19% | 0.17%
Tresa At Arrowhead | Floating Rate |  |
Mortgage Loans on Real Estate [Line Items] |  |
Debt instrument interest rate | 2.25% | 2.25%
Tresa At Arrowhead | 30-Day LIBOR |  |
Mortgage Loans on Real Estate [Line Items] |  |
Debt instrument interest rate | 0.19% | 0.17%
Secured Credit Facility | Floating Rate |  |
Mortgage Loans on Real Estate [Line Items] |  |
Debt instrument interest rate | 2.50% | 2.50%
Secured Credit Facility | 30-Day LIBOR |  |
Mortgage Loans on Real Estate [Line Items] |  |
Debt instrument interest rate | 0.19% | 0.17%

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