2.4.0.82117100 - Disclosure - Subsequent Eventstruefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0000921112duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_SubsequentEventsAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Subsequent Events [Abstract]2false 2us-gaap_SubsequentEventsTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;text-decoration:underline;">Subsequent Events</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On July 31, 2013, the Company entered into a definitive agreement to acquire all of the outstanding partnership interests in the operating partnership of the Cabot Industrial Value Fund III (the "Fund") for a purchase price of </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;font-style:normal;font-weight:normal;text-decoration:none;">$1.475 billion</font><font style="font-family:inherit;font-size:10pt;">. The Fund owns </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;font-style:normal;font-weight:normal;text-decoration:none;">23 million</font><font style="font-family:inherit;font-size:10pt;"> square feet of industrial properties.&#160; The Company expects to finance the purchase price in part through the assumption of approximately </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;font-style:normal;font-weight:normal;text-decoration:none;">$230 million</font><font style="font-family:inherit;font-size:10pt;"> in outstanding indebtedness and has received a commitment for a bridge loan of approximately </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;font-style:normal;font-weight:normal;text-decoration:none;">$1.27 billion</font><font style="font-family:inherit;font-size:10pt;"> to finance the remainder of the purchase price, which it may replace with a combination of equity financing and permanent debt.</font></div></div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.No definition available.false0Subsequent Events [Text Block]falseSubsequent EventsUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.libertyproperty.com/role/SubsequentEvents12