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Limited Partners' Equity of the Operating Partnership - Narrative (Details) (Liberty Property Limited Partnership [Member], USD $)
In Millions, except Share data, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
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Liberty Property Limited Partnership [Member]
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| Limited Partners' Capital Account [Line Items] | ||
| Limited Partners' Capital Account, Units Outstanding | 3,539,075 | 3,553,566 |
| market value of the outstanding common units | $ 126.3 |