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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2014
Commitments and Contingencies [Abstract] |
Schedule of Contractural Obligations [Table Text Block] | The following table summarizes the Company’s contractual obligations for minimum rent payments under operating leases and deferred compensation for the next five years and thereafter as of December 31, 2014:
(Payments)/Receipts Due by Year (in thousands)
|  | 2015 |  | 2016 |  | 2017 |  | 2018 |  | 2019 |  | Thereafter |  | Total
Operating Leases: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum Rent Payments (a) |  | $ | (15,268 | ) |  | $ | (15,385 | ) |  | $ | (15,318 | ) |  | $ | (15,298 | ) |  | $ | (15,224 | ) |  | $ | (860,071 | ) |  | $ | (936,564 | )
Minimum Rent Receipts (b) |  | 65,087 |  |  | 58,860 |  |  | 53,448 |  |  | 43,987 |  |  | 37,545 |  |  | 192,455 |  |  | 451,382 |
Other Long-Term Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation (c) |  | (1,382 | ) |  | (1,714 | ) |  | (1,714 | ) |  | (1,714 | ) |  | (1,120 | ) |  | (5,149 | ) |  | (12,793 | )
(a) | Minimum basic rent due for various office space the Company leases and fixed base rent due on ground leases for 14 properties/parcels.
(b) | Minimum basic rent receipts due for various retail/commercial space where the Company is the lessor.
(c) | Estimated payments to the Company's Chairman, Vice Chairman and one former CEO based on actual and planned retirement dates.

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- Definition Represents a summary of the Company's contractual obligations for minimum rent payments under operating leases for various office space and fixed base rent on ground leases as well as for deferred compensation for executives and certain trustees. + References No definition available. + Details
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