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Business Segments (Summary Of Results Of Operations For Principal Business Segments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue | $ 66,918 | $ 72,803 | $ 131,707 | $ 133,386
Segment operating income | 6,088 | 10,486 | 10,782 | 15,718
Inter-segment Elimination [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue | (1,843) | (1,691) | (3,619) | (3,409)
Operating Segments [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment operating income | 11,123 | 14,786 | 20,901 | 23,414
Cinema Exhibition [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue | 63,439 | 68,957 | 124,754 | 125,855
Cinema Exhibition [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment operating income | 9,122 | 12,568 | 16,810 | 18,906
Real Estate [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue | 5,322 | 5,537 | 10,572 | 10,940
Real Estate [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment operating income | $ 2,001 | $ 2,218 | $ 4,091 | $ 4,508

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