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Revenues (Schedule Of Annual Future Base Rents Due To Be Received Under Non-Cancelable Operating Leases) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Revenues [Abstract] |  |  |
2016 | $ 108,891,000 |  |
2017 | 99,195,000 |  |
2018 | 89,025,000 |  |
2019 | 74,704,000 |  |
2020 | 57,484,000 |  |
Thereafter | 250,979,000 |  |
Future rents due to be received | 680,278,000 |  |
Expense recoveries | $ 32,600,000 | $ 32,100,000 | $ 29,500,000

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