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Indebtedness - Additional Information (Detail) $ in Thousands, ft² in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2016 USD ($) ft² Property | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |
Number of industrial properties acquired | Property | 4 |
Gross leasable area (GLA) of industrial properties acquired | ft² | 0.5 |
Assumed mortgage, premium | $ 529 |
2016 Notes |  |
Debt Instrument [Line Items] |  |
Extinguishment of debt, amount | 159,679 |
Mortgages |  |
Debt Instrument [Line Items] |  |
Unamortized deferred financing costs | 3,145 | $ 3,714
Assumed mortgage loan | $ 4,513 |
Number of industrial properties acquired | Property | 1 |
Gross leasable area (GLA) of industrial properties acquired | ft² | 0.1 |
Assumed mortgage, fixed interest rate | 7.35% |
Assumed mortgage, term | 25 years |
Assumed mortgage, premium | $ 529 |
Extinguishment of debt, amount | 57,901 |
Net carrying value of industrial properties collateralized by mortgage loans | 666,033 |
Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Unamortized deferred financing costs | 363 | 499
Unsecured Term Loan |  |
Debt Instrument [Line Items] |  |
Unamortized deferred financing costs | 3,529 | 4,030
Unsecured Credit Facility |  |
Debt Instrument [Line Items] |  |
Unamortized deferred financing costs | $ 3,208 | $ 4,204

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