Debt Instrument, Extension Length

No definition available.

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- Definition

Equity Method Investment, Qualitative Disclosure, Loan to Value Ratio

+ References

No definition available.

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- Definition

Represents the gain (loss) from the proceeds received on account of consolidation of assets and liabilities of property valued as per the discounted cash flow model.

+ References

No definition available.

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- Definition

Investment fund manager, ownership interest in joint venture

+ References

No definition available.

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- Definition

Joint venture closing costs

+ References

No definition available.

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- Definition

Joint venture, closing costs percentage

+ References

No definition available.

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- Definition

Loan to value ratio

+ References

No definition available.

+ Details

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- Definition

Number of extension options

+ References

No definition available.

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- Definition

Number of properties contributed

+ References

No definition available.

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- Definition

Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

+ References

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

This element represents the aggregate cost of investments 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 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

This item represents the amount of net sales proceeds received on disposal of an equity method investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 35
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=49116238&loc=d3e32847-111569

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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

+ Details

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- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

+ References

No definition available.

+ Details

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- Definition

The amount of noncurrent liabilities reported by an equity method investment of the entity.

+ 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 (c)
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-Topic 235
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(g))
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph w
-Article 1

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-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph g
-Subparagraph 1, 2
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph bb
-Article 1

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Amount of the present value of future profits asset amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section S99
-Paragraph 2
-Subparagraph 2
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-Name Accounting Standards Codification
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-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph 7
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- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

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- Definition

The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(d))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Investment In Unconsolidated Joint Ventures (Narrative) (Details)					3 Months Ended	12 Months Ended
	Oct. 17, 2014 USD ($)	Sep. 09, 2014 USD ($) extension	Mar. 05, 2014 USD ($)	Sep. 27, 2013 USD ($) property	Dec. 31, 2015 USD ($) property	Dec. 31, 2015 USD ($) property	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) property	Sep. 30, 2014 property
Schedule of Equity Method Investments [Line Items]
Amortization of difference from cost and book value of investment in joint venture						$ 300,000	$ 500,000	$ 100,000
Gain on contribution of properties to unconsolidated joint ventures						0	95,404,000	$ 115,609,000
Investment in unconsolidated joint ventures					$ 106,107,000	$ 106,107,000	$ 94,729,000
Number of real estate properties \| property					139	139
2001 Sixth Avenue
Schedule of Equity Method Investments [Line Items]
% Ownership					50.00%	50.00%	50.00%	50.00%
33 Chun Choi Street (Hong Kong)
Schedule of Equity Method Investments [Line Items]
% Ownership					50.00%	50.00%	50.00%	50.00%
PREI ®
Schedule of Equity Method Investments [Line Items]
Number of properties contributed \| property				9
Gross Value				$ 366,400,000
Joint venture, closing costs percentage				20.00%
Joint venture closing costs				$ 2,800,000
% Ownership				20.00%	20.00%	20.00%	20.00%
Investment fund manager, ownership interest in joint venture				80.00%
Gain on contribution of properties to unconsolidated joint ventures								$ 115,600,000
Ownership percentage by parent								80.00%
Gain on sale of investment			$ 164,800,000
Number of real estate properties \| property					10	10		9
Net proceeds from joint venture								$ 328,600,000
PREI ® \| Notes Payable to Banks
Schedule of Equity Method Investments [Line Items]
Debt face amount				$ 185,000,000
Debt instrument term (in years)				5 years
Loan to value ratio				50.00%
PREI ® \| Notes Payable to Banks \| London Interbank Offered Rate (LIBOR)
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate				1.80%
Crawley 2
Schedule of Equity Method Investments [Line Items]
Gross Value			$ 40,400,000
Ownership percentage by parent			80.00%
Equity method investment noncurrent liabilities			$ 26,100,000
Investment in unconsolidated joint ventures			14,300,000
Proceeds from sale of equity investment			11,400,000
Line of credit			23,000,000
Gain on sale of investment			1,900,000
Net proceeds from joint venture			$ 17,500,000
GCEAR
Schedule of Equity Method Investments [Line Items]
Gross Value		$ 185,500,000
% Ownership		20.00%			20.00%	20.00%	20.00%
Ownership percentage by parent		80.00%					80.00%
Number of real estate properties \| property									1
Transaction costs		$ 2,100,000
GCEAR \| Secured Debt
Schedule of Equity Method Investments [Line Items]
Debt face amount		$ 102,000,000
Debt instrument term (in years)		5 years
Basis spread on variable rate		2.25%
Proceeds from sale of equity investment		$ 167,500,000
Gain on sale of investment							$ 93,500,000
Loan to value ratio		55.00%
Number of extension options \| extension		2
Debt extension		1 year
GCEAR \| Secured Debt \| London Interbank Offered Rate (LIBOR)
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate		2.25%
Southwestern United States and Mexico Properties
Schedule of Equity Method Investments [Line Items]
Gain on sale of investment					$ 14,600,000
Net proceeds from joint venture	$ 31,700,000
Southwestern United States and Mexico Properties \| Other Assets
Schedule of Equity Method Investments [Line Items]
Gross Value	$ 17,100,000
Interest Rate Swap \| GCEAR \| Secured Debt
Schedule of Equity Method Investments [Line Items]
Debt face amount		$ 51,000,000