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Business Segments (Summary Of Results Of Operations For Principal Business Segments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue | $ 71,315 | $ 57,788 | $ 203,022 | $ 191,174
Segment operating income | 6,610 | 3,120 | 17,392 | 18,840
Inter-segment Elimination [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue | (1,900) | (1,548) | (5,518) | (4,957)
Operating Segments [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment operating income | 11,481 | 6,281 | 32,380 | 29,697
Cinema Exhibition [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue | 67,825 | 54,368 | 192,579 | 180,223
Cinema Exhibition [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment operating income | 9,726 | 4,838 | 26,536 | 23,745
Real Estate [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue | 5,390 | 4,968 | 15,961 | 15,908
Real Estate [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Segment operating income | $ 1,755 | $ 1,443 | $ 5,844 | $ 5,952

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