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Indebtedness - Summary of Indebtedness (Detail) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |
Mortgage Loans Payable, Net |  | $ 500,176 | $ 561,241
Senior Unsecured Notes, Net |  | 204,945 | 364,457
Unsecured Term Loans, Net |  | 456,471 | 455,970
Unsecured Credit Facility |  | 163,500 | 52,500
2016 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Senior Unsecured Notes, Gross |  | $ 0 | 159,679
Maturity Date |  | Jan. 15, 2016 |
2017 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Senior Unsecured Notes, Gross |  | $ 54,981 | 54,981
Interest Rate |  | 7.50% |
Effective Interest Rate |  | 7.52% |
Maturity Date |  | Dec. 01, 2017 |
2027 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Senior Unsecured Notes, Gross |  | $ 6,070 | 6,070
Interest Rate |  | 7.15% |
Effective Interest Rate |  | 7.11% |
Maturity Date |  | May 15, 2027 |
2028 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Senior Unsecured Notes, Gross |  | $ 31,901 | 31,901
Interest Rate |  | 7.60% |
Effective Interest Rate |  | 8.13% |
Maturity Date |  | Jul. 15, 2028 |
2032 Notes |  |  |
Debt Instrument [Line Items] |  |  |
Senior Unsecured Notes, Gross |  | $ 10,600 | 10,600
Interest Rate |  | 7.75% |
Effective Interest Rate |  | 7.87% |
Maturity Date |  | Apr. 15, 2032 |
2017 II Notes |  |  |
Debt Instrument [Line Items] |  |  |
Senior Unsecured Notes, Gross |  | $ 101,871 | 101,871
Interest Rate |  | 5.95% |
Effective Interest Rate |  | 6.37% |
Maturity Date |  | May 15, 2017 |
2014 Unsecured Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured Term Loans, Gross | [1] | $ 200,000 | 200,000
Interest Rate | [1] | 3.99% |
Maturity Date | [1] | Jan. 29, 2021 |
2015 Unsecured Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Unsecured Term Loans, Gross | [1] | $ 260,000 | 260,000
Interest Rate | [1] | 3.39% |
Maturity Date | [1] | Sep. 12, 2022 |
Mortgages |  |  |
Debt Instrument [Line Items] |  |  |
Mortgage Loans Payable, Gross |  | $ 502,853 | 564,891
Unamortized Deferred Financing Costs |  | (3,145) | (3,714)
Unamortized Premiums |  | 468 | 64
Mortgage Loans Payable, Net |  | $ 500,176 | 561,241
Interest Rate |  | 7.35% |
Maturity Date Range, Start |  | Jun. 01, 2018 |
Maturity Date Range, End |  | Sep. 01, 2022 |
Senior Unsecured Notes |  |  |
Debt Instrument [Line Items] |  |  |
Unamortized Deferred Financing Costs |  | $ (363) | (499)
Senior Unsecured Notes, Gross |  | 205,423 | 365,102
Unamortized Discounts |  | (115) | (146)
Senior Unsecured Notes, Net |  | 204,945 | 364,457
Unsecured Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Unamortized Deferred Financing Costs |  | (3,529) | (4,030)
Unsecured Term Loans, Gross |  | 460,000 | 460,000
Unsecured Term Loans, Net |  | 456,471 | 455,970
Unsecured Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Unamortized Deferred Financing Costs |  | (3,208) | (4,204)
Unsecured Credit Facility | [2] | $ 163,500 | $ 52,500
Interest Rate | [2] | 1.67% |
Maturity Date | [2] | Mar. 11, 2019 |
Minimum | Mortgages |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate |  | 4.03% |
Effective Interest Rate |  | 3.82% |
Maximum | Mortgages |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate |  | 8.26% |
Effective Interest Rate |  | 8.26% |
[1] | The interest rate at September 30, 2016 reflects the interest rate protection agreements we entered into to effectively convert the variable rate to a fixed rate. See Note 10.
[2] | The maturity date may be extended an additional year at our election, subject to certain restrictions. Amounts exclude unamortized deferred financing costs of $3,208 and $4,204 as of September 30, 2016 and December 31, 2015, respectively, which are included in prepaid expenses and other assets, net on the consolidated balance sheets.

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