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Information by Business Segment (Details 3) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013
--- | --- | --- | ---
Reconciliation of segment assets to total assets |  |  |
Assets | $ 3,680,188 | $ 3,629,952 | $ 3,755,588
Segment assets |  |  |
Reconciliation of segment assets to total assets |  |  |
Assets | 2,962,686 |  | 3,053,813
Non-operating property assets |  |  |
Reconciliation of segment assets to total assets |  |  |
Assets | 518,951 |  | 530,389
Other assets |  |  |
Reconciliation of segment assets to total assets |  |  |
Assets | $ 198,551 |  | $ 171,386

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