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Summary Of Significant Accounting Policies (Balance With And Without The Adoption Of ASC 842 On The Statements Of Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jan. 01, 2019 | Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Costs and expenses | $ 70,279 |  | $ 75,648 |  | $ 133,131 | $ 145,827 |  |
Depreciation and amortization | 5,572 |  | 5,626 |  | 11,166 | 10,877 |  |
General and administrative | 6,034 |  | 7,165 |  | 12,518 | 14,761 |  |
Interest expense, net | 2,204 |  | 1,790 |  | 4,054 | 3,384 |  |
Income tax (benefit) expense | 1,654 |  | 1,965 |  | 612 | 3,135 |  |
Net income (loss) | 2,357 | $ (2,097) | 5,129 | $ 3,104 | 260 | 8,232 |  |
Operating property, net | 255,761 |  |  |  | 255,761 |  | $ 258,037 | $ 257,667
Intangible assets, net | 3,659 |  |  |  | 3,659 |  | 3,827 | 7,369
Operating lease right-of-use assets | 224,878 |  |  |  | 224,878 |  | 232,319 |
Deferred tax asset, net | 26,336 |  |  |  | 26,336 |  | 26,317 | 26,235
Other current liabilities | 9,643 |  |  |  | 9,643 |  |  | 9,305
Operating lease liabilities - current | 19,658 |  |  |  | 19,658 |  | 245,280 |
Other non-current liabilities | 12,525 |  |  |  | 12,525 |  | 12,898 | 28,931
Operating lease liabilities - non-current portion | 218,610 |  |  |  | 218,610 |  |  |
Retained earnings | 47,957 |  |  |  | 47,957 |  | $ 47,644 | $ 47,616
Balance Without Adoption Of ASC 842 [[Member] |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Depreciation and amortization | 5,532 |  |  |  | 11,084 |  |  |
General and administrative | 6,077 |  |  |  | 12,605 |  |  |
Interest expense, net | 2,198 |  |  |  | 4,047 |  |  |
Income tax (benefit) expense | 1,638 |  |  |  | 597 |  |  |
Net income (loss) | 2,334 |  |  |  | 230 |  |  |
Operating property, net | 255,522 |  |  |  | 255,522 |  |  |
Intangible assets, net | 7,031 |  |  |  | 7,031 |  |  |
Deferred tax asset, net | 26,269 |  |  |  | 26,269 |  |  |
Other current liabilities | 9,735 |  |  |  | 9,735 |  |  |
Other non-current liabilities | 28,886 |  |  |  | 28,886 |  |  |
Retained earnings | 47,927 |  |  |  | 47,927 |  |  |
Effect Of Change Higher/(Lower) [Member] |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Depreciation and amortization | 40 |  |  |  | 82 |  |  |
General and administrative | (43) |  |  |  | (87) |  |  |
Interest expense, net | 6 |  |  |  | 7 |  |  |
Income tax (benefit) expense | 16 |  |  |  | 15 |  |  |
Net income (loss) | 23 |  |  |  | 30 |  |  |
Operating property, net | 239 |  |  |  | 239 |  |  |
Intangible assets, net | (3,372) |  |  |  | (3,372) |  |  |
Operating lease right-of-use assets | 224,878 |  |  |  | 224,878 |  |  |
Deferred tax asset, net | 67 |  |  |  | 67 |  |  |
Other current liabilities | (92) |  |  |  | (92) |  |  |
Operating lease liabilities - current | 19,658 |  |  |  | 19,658 |  |  |
Other non-current liabilities | (16,361) |  |  |  | (16,361) |  |  |
Operating lease liabilities - non-current portion | 218,610 |  |  |  | 218,610 |  |  |
Retained earnings | 30 |  |  |  | 30 |  |  |
Cinema [Member] |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Costs and expenses | 56,235 |  | $ 60,306 |  | 104,564 | $ 115,254 |  |
Cinema [Member] | Balance Without Adoption Of ASC 842 [[Member] |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Costs and expenses | 56,277 |  |  |  | 104,611 |  |  |
Cinema [Member] | Effect Of Change Higher/(Lower) [Member] |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Costs and expenses | $ (42) |  |  |  | $ (47) |  |  |

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