| **Revenue Recognition Revenue by Commodity and Location (Details) - USD ($) $ in Thousands** | 3 Months Ended |
|----------------------------------------------------------------------------------------------|----------------|
||
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 813,284      | $ 882,378 |
| Revenue year over year percentage change [Line Items]                                        | (8.00%)        |   |
| Delaware Basin                                                                               |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 94,924       | 147,893 |
| Revenue year over year percentage change [Line Items]                                        | (36.00%)       |   |
| Wattenberg Field                                                                             |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 718,360      | 734,485 |
| Revenue year over year percentage change [Line Items]                                        | (2.00%)        |   |
| Crude Oil [Member]                                                                           |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 514,299      | 549,749 |
| Revenue year over year percentage change [Line Items]                                        | (6.00%)        |   |
| Crude Oil [Member] | Wattenberg Field                                                        |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 445,846      | 451,911 |
| Revenue year over year percentage change [Line Items]                                        | (1.00%)        |   |
| Crude Oil [Member] | Delaware Basin                                                          |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 68,453       | 97,838 |
| Revenue year over year percentage change [Line Items]                                        | (30.00%)       |   |
| Natural Gas [Member]                                                                         |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 161,042      | 163,124 |
| Revenue year over year percentage change [Line Items]                                        | (1.00%)        |   |
| Natural Gas [Member] | Wattenberg Field                                                      |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 153,355      | 143,699 |
| Revenue year over year percentage change [Line Items]                                        | 7.00%          |   |
| Natural Gas [Member] | Delaware Basin                                                        |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 7,687        | 19,425 |
| Revenue year over year percentage change [Line Items]                                        | (60.00%)       |   |
| Natural Gas Liquids [Member]                                                                 |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 137,943      | 169,505 |
| Revenue year over year percentage change [Line Items]                                        | (19.00%)       |   |
| Natural Gas Liquids [Member] | Wattenberg Field                                              |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 119,159      | 138,875 |
| Revenue year over year percentage change [Line Items]                                        | (14.00%)       |   |
| Natural Gas Liquids [Member] | Delaware Basin                                                |           |   |
| Revenue from Contract with Customer, Excluding Assessed Tax                                  | $ 18,784       | $ 30,630 |
| Revenue year over year percentage change [Line Items]                                        | (39.00%)       |   |

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.
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