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Subsequent Events - Additional Information (Detail) (USD $) | 12 Months Ended |  | 2 Months Ended |  | 0 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 Property | Dec. 31, 2012 Property | Dec. 31, 2011 Property | Dec. 31, 2013 Series F Preferred Stock | Feb. 27, 2014 Subsequent Event [Member] Parcels | Feb. 03, 2014 Subsequent Event [Member] Series F Preferred Stock | Feb. 03, 2014 Subsequent Event [Member] Series G Preferred Stock [Member] | Jan. 29, 2014 Unsecured Debt [Member] Subsequent Event [Member] | Jan. 29, 2014 London Interbank Offered Rate (LIBOR) [Member] Unsecured Debt [Member] Subsequent Event [Member] | Jan. 29, 2014 Series F Agreement Subsequent Event [Member] | Jan. 29, 2014 Series F Agreement Unsecured Debt [Member] Subsequent Event [Member]
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of industrial properties acquired | 2 | 1 | 1 |  | 1 |  |  |  |  |  |
Purchase price of acquisition | $ 73,642,000 | $ 55,508,000 | $ 5,277,000 |  | $ 13,400,000 |  |  |  |  |  |
Number of industrial properties sold | 67 | 28 | 36 |  | 1 |  |  |  |  |  |
Proceeds from sale of industrial property | 126,250,000 | 82,503,000 | 75,953,000 |  | 1,335,000 |  |  |  |  |  |
Loan Principal |  |  |  |  |  |  |  | 200,000 |  |  |
Loan Term |  |  |  |  |  |  |  | 7 years |  |  |
Basis points in addition to LIBOR |  |  |  |  |  |  |  |  | 175.00% |  |
Derivative, notional amount |  |  |  |  |  |  |  |  |  | 200,000 |
Fixed interest rate converted from LIBOR |  |  |  |  |  |  |  |  |  |  | 4.04%
Stock announced to be redeemed, shares |  |  |  |  |  | 50,000 | 25,000 |  |  |  |
Redemption price per share |  |  |  | $ 1,000.00 |  | $ 1,000.00 | $ 1,000.00 |  |  |  |
Aggregate redemption price | $ (150,051,000) | $ (50,044,000) |  | $ 50,000,000 |  | $ 50,000 | $ 25,000 |  |  |  |

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- Definition The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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