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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 |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Jan. 01, 2019 | Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Costs and expenses | $ 62,852 | $ 70,179 |  |
Depreciation and amortization | 5,594 | 5,250 |  |
General and administrative | 6,484 | 7,597 |  |
Interest expense, net | 1,852 | 1,594 |  |
Income tax (benefit) expense | 1,042 | (1,170) |  |
Net income (loss) | (2,097) | 3,104 |  |
Operating property, net | 257,402 |  | $ 258,037 | $ 257,667
Intangible assets, net | 3,694 |  | 3,827 | 7,369
Operating lease right-of-use assets | 229,266 |  | 232,319 |
Deferred tax asset, net | 26,483 |  | 26,317 | 26,235
Other current liabilities | 9,525 |  |  | 9,305
Operating lease liabilities - current | 19,797 |  | 245,280 |
Other non-current liabilities | 12,346 |  | 12,898 | 28,931
Operating lease liabilities - non-current portion | 222,594 |  |  |
Retained earnings | 45,563 |  | $ 47,644 | $ 47,616
Balance Without Adoption Of ASC 842 [[Member] |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Depreciation and amortization | 5,552 |  |  |
General and administrative | 6,528 |  |  |
Interest expense, net | 1,849 |  |  |
Income tax (benefit) expense | 1,041 |  |  |
Net income (loss) | (2,094) |  |  |
Operating property, net | 257,072 |  |  |
Intangible assets, net | 7,151 |  |  |
Deferred tax asset, net | 26,400 |  |  |
Other current liabilities | 9,363 |  |  |
Other non-current liabilities | 28,643 |  |  |
Retained earnings | 45,585 |  |  |
Effect Of Change Higher/(Lower) [Member] |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Depreciation and amortization | 42 |  |  |
General and administrative | (44) |  |  |
Interest expense, net | 3 |  |  |
Income tax (benefit) expense | 1 |  |  |
Net income (loss) | 3 |  |  |
Operating property, net | 330 |  |  |
Intangible assets, net | (3,457) |  |  |
Operating lease right-of-use assets | 229,266 |  |  |
Deferred tax asset, net | 83 |  |  |
Other current liabilities | 162 |  |  |
Operating lease liabilities - current | 19,797 |  |  |
Other non-current liabilities | (16,297) |  |  |
Operating lease liabilities - non-current portion | 222,594 |  |  |
Retained earnings | (22) |  |  |
Cinema [Member] |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Costs and expenses | 48,329 | $ 54,948 |  |
Cinema [Member] | Balance Without Adoption Of ASC 842 [[Member] |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Costs and expenses | 48,334 |  |  |
Cinema [Member] | Effect Of Change Higher/(Lower) [Member] |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Costs and expenses | $ (5) |  |  |

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