Description Of Business And Segment Reporting (Summary Of Capital Expenditures) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Segment Reporting Information [Line Items] | |||
Total capital expenditures | $ 56,827 | $ 76,708 | $ 49,166 |
Segment [Member] | |||
Segment Reporting Information [Line Items] | |||
Total capital expenditures | 56,795 | 76,300 | 49,023 |
Corporate [Member] | |||
Segment Reporting Information [Line Items] | |||
Total capital expenditures | $ 32 | $ 408 | $ 143 |