Liberty Washington LP [Abstract]

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

Gross amount of debt extinguished.

+ References

No definition available.

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- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629

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- Definition

Net rentable area for properties owned.

+ References

No definition available.

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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Unconsolidated Joint Ventures (Details)	3 Months Ended	6 Months Ended
Unconsolidated Joint Ventures (Details)	Jun. 30, 2016 USD ($) ft² bldg	Jun. 30, 2016 USD ($) ft² bldg	Jun. 30, 2015 USD ($)
Liberty Washington LP [Abstract]
Gain on sale of properties		$ 24,353,000	$ 3,520,000
Liberty Washington, LP [Member]
Liberty Washington LP [Abstract]
Equity Method Investment, Ownership Percentage	25.00%	25.00%
Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Joint venture, 2016 sales [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Net Rentable Area \| ft²	601,000	601,000
Number of Real Estate Properties \| bldg	3	3
Proceeds from Sale of Property		$ 80,500,000
Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Joint venture, 2016 foreclosure transfer [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Net Rentable Area \| ft²	248,000	248,000
Number of Real Estate Properties \| bldg	2	2
Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Joint venture, 2016 transfer to lender [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Net Rentable Area \| ft²	698,000	698,000
Number of Real Estate Properties \| bldg	6	6
Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Mortgages [Member] \| Joint venture, 2016 foreclosure transfer [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Extinguishment of Debt, Amount	$ 46,400,000
Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Mortgages [Member] \| Joint venture, 2016 transfer to lender [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Extinguishment of Debt, Amount		$ 112,500,000
General Partner [Member] \| Gain on equity method investments [Member] \| Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Joint venture, 2016 foreclosure transfer [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Gain on sale of properties	158,000
General Partner [Member] \| Gain on equity method investments [Member] \| Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Joint venture, 2016 transfer to lender [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Gain on sale of properties		2,000,000
General Partner [Member] \| Gain on equity method investments [Member] \| Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Mortgages [Member] \| Joint venture, 2016 foreclosure transfer [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Gain on extinguishment of debt	$ 3,300,000
General Partner [Member] \| Gain on equity method investments [Member] \| Liberty Washington, LP [Member] \| Disposal Group, Not Discontinued Operations [Member] \| Mortgages [Member] \| Joint venture, 2016 transfer to lender [Member] \| Building and Building Improvements [Member]
Liberty Washington LP [Abstract]
Gain on extinguishment of debt		$ 4,200,000