Gain On Sale Of Assets (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
Dec. 31, 2014 |
|
| Gain On Sale of Assets [Abstract] | |||||
| Gain on Conveyances | $ 8.3 | $ 0.3 | $ 13.6 | $ 17.8 | |
| Deferred Gains On Conveyances | $ 10.9 | $ 10.9 | $ 19.6 | ||