Summary Of Significant Accounting Policies (Schedule Of Estimated Useful Lives Of Assets) (Details) |
12 Months Ended |
---|---|
Dec. 31, 2017 | |
Building And Improvements [Member] | Minimum [Member] | |
Summary Of Significant Accounting Policies [Line Items] | |
Estimated useful life | 15 years |
Building And Improvements [Member] | Maximum [Member] | |
Summary Of Significant Accounting Policies [Line Items] | |
Estimated useful life | 60 years |
Theater Equipment [Member] | |
Summary Of Significant Accounting Policies [Line Items] | |
Estimated useful life | 7 years |
Furniture And Fixtures [Member] | Minimum [Member] | |
Summary Of Significant Accounting Policies [Line Items] | |
Estimated useful life | 5 years |
Furniture And Fixtures [Member] | Maximum [Member] | |
Summary Of Significant Accounting Policies [Line Items] | |
Estimated useful life | 10 years |