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Derivative Instruments and Hedging Activities (Details Textual) (Interest rate swap [Member])	12 Months Ended
	Dec. 31, 2012 Swap_Agreements
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Number of Interest rate swap agreements	2
Mortgage loan expiry date	Apr. 16, 2019
First half of mortgage [Member]
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Strike rate	5.91%
Second half of mortgage [Member]
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Strike rate	6.07%

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

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-Name Accounting Standards Codification

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Stated maturity date of the mortgage loan receivable on real estate, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section S99

-Paragraph 1

-Subparagraph (SX 210.12-29)

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-Name Accounting Standards Codification

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-Number 210

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