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Derivative Instruments and Hedging Activities (Details Textual)	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2010 Interest rate swap [Member] Contract	Mar. 31, 2013 First half of mortgage [Member] Interest rate swap [Member]	Mar. 31, 2013 Second half of mortgage [Member] Interest rate swap [Member]
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Number of Interest rate swap agreements		2
Strike rate			5.91%	6.07%
Mortgage loan expiry date	Apr. 16, 2019

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

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

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-Topic 815

-SubTopic 10

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

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-Name Accounting Standards Codification

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