Summary of Significant Accounting Policies (Details Textuals 2) (Barclays Center Arena [Member], USD $) In Thousands, unless otherwise specified	Jan. 31, 2013
Barclays Center Arena [Member]
Variable Interest Entity [Line Items]
Decrease in real estate, net due to deconsolidation of the VIE	$ 552,226
Decrease in cash and equivalents due to deconsolidation of the VIE	1,405
Decrease in restricted cash and escrowed funds due to deconsolidation of the VIE	17,574
Decrease in other assets due to deconsolidation of the VIE	26,681
Decrease in nonrecourse mortgage debt due to deconsolidation of the VIE	192,958
Decrease in accounts payable, accrued expenses and other liabilities due to deconsolidation of the VIE	$ 84,908

Decrease in accounts payable, accrued expenses and other liabilities due to deconsolidation of the VIE

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Decrease in cash and equivalents due to deconsolidation of the VIE

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Decrease in nonrecourse mortgage debt due to deconsolidation of the VIE

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Decrease in other assets due to deconsolidation of the VIE

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Decrease in real estate, net due to deconsolidation of the VIE

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Decrease in restricted cash and escrowed funds due to deconsolidation of the VIE

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