Principles Of Preparation (Depreciation) (Details) - Public Utilities, Regulatory Rate Making Impact - PUCT - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Aug. 25, 2016 |
Sep. 30, 2016 |
Sep. 30, 2016 |
|
| Property, Plant and Equipment [Line Items] | |||
| Decrease in Depreciation Expense | $ 8,500 | $ 7,400 | $ 7,400 |
| Expected Decrease In Depreciation Expense | $ 9,500 |