2.2.0.25truefalse0201 - Disclosure - Organizationtruefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Jan-01-2010_Dec-31-2010http://www.sec.gov/CIK0000921112duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2false0us-gaap_NatureOfOperationsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00  <div align="left" style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; ">   <div align="center" style="font-size: 10pt; margin-top: 0pt"><b></b> </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt"><b>1. ORGANIZATION</b> </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”). The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 96.7% of the common equity of the Operating Partnership at December 31, 2010. The Company provides leasing, property management, development, acquisition, and other tenant-related services for a portfolio of industrial and office properties which are located principally within the Mid-Atlantic, Southeastern, Midwestern and Southwestern United States and the United Kingdom. </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">All square footage amounts are unaudited. </div> </div> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescribes the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings). Disclosures about the nature of operations need not be quantified; relative importance could be conveyed by use of terms such as "predominately", "about equally", or "major and other". This element is also referred to as "Business Description".Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 10 falsefalseORGANIZATION3false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://libertyproperty.com/role/organization1falsefalsefalse00falsefalsefalsefalsefalse2falsefalseUSDtruefalse{dei_LegalEntityAxis} : LIBERTY PROPERTY LIMITED PARTNERSHIP 1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Jan-01-2010_Dec-31-2010_Limited_Partnership_Memberhttp://www.sec.gov/CIK0000921112duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseLIBERTY PROPERTY LIMITED PARTNERSHIPdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldilry_LimitedPartnershipMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseLIBERTY PROPERTY LIMITED PARTNERSHIP4false0us-gaap_NatureOfOperationsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00  <div style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; "> <div align="justify" style="font-size: 10pt; margin-top: 10pt"><b>1. ORGANIZATION</b> </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">Liberty Property Trust (the “Trust”) is a self-administered and self-managed Maryland real estate investment trust (a “REIT”). Substantially all of the Trust’s assets are owned directly or indirectly, and substantially all of the Trust’s operations are conducted directly or indirectly, by its subsidiary, Liberty Property Limited Partnership, a Pennsylvania limited partnership (the “Operating Partnership” and, together with the Trust and their consolidated subsidiaries, the “Company”). The Trust is the sole general partner and also a limited partner of the Operating Partnership, owning 96.7% of the common equity of the Operating Partnership at December 31, 2010. The Company provides leasing, property management, development, acquisition, and other tenant-related services for a portfolio of industrial and office properties which are located principally within the Mid-Atlantic, Southeastern, Midwestern and Southwestern United States and the United Kingdom. </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">All square footage amounts are unaudited. </div> </div> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescribes the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings). Disclosures about the nature of operations need not be quantified; relative importance could be conveyed by use of terms such as "predominately", "about equally", or "major and other". This element is also referred to as "Business Description".Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 10 falsefalseORGANIZATION13OrganizationUnKnownUnKnownUnKnownUnKnownfalsetrue