Acquisitions & Divestitures	3 Months Ended
Mar. 31, 2018
Business Combinations [Abstract]
Acquisitions & Divestitures [Text Block]	Acquisitions During the three months ended March 31, 2018, QEP acquired various oil and gas properties, which primarily included proved and unproved leasehold acreage in the Permian Basin for an aggregate purchase price of $36.2 million, subject to customary purchase price adjustments. Of the $36.2 million, $35.7 million was related to acquisitions from various persons who owned additional oil and gas interests in certain properties included in the 2017 acquisition of oil and gas properties in the Permian Basin (the 2017 Permian Basin Acquisition) on substantially the same terms and conditions as the 2017 Permian Basin Acquisition in the fourth quarter of 2017. During the three months ended March 31, 2017, QEP acquired various oil and gas properties, which primarily included proved and unproved leasehold acreage and additional surface acreage in the Permian Basin, for an aggregate purchase price of $68.2 million. In conjunction with these acquisitions, the Company recorded $5.3 million of goodwill, which was subsequently impaired in 2017. 2018 Strategic Initiatives In February 2018, QEP's Board of Directors unanimously approved certain strategic and financial initiatives (Strategic Initiatives) including plans to market its assets in the Williston Basin, the Uinta Basin and Haynesville/Cotton Valley and focus its activities in the Permian Basin. As a part of this process, in February 2018, the Company engaged advisors to assist with the divestitures of its Williston Basin and Uinta Basin assets and has provided data for potential buyers in April 2018. The assets will be considered held for sale once it is deemed unlikely that there will be any significant changes to QEP's divestiture plan, which QEP believes will be upon the execution of purchase and sale agreements. Pinedale Divestiture In September 2017, QEP sold its assets in Pinedale (the Pinedale Divestiture), for net cash proceeds (after purchase price adjustments) of $718.2 million, subject to additional post-closing purchase price adjustments. For the three months ended March 31, 2018, QEP recorded a pre-tax gain on sale of $1.0 million, due to post-closing purchase price adjustments, which were recorded within "Net gain (loss) from asset sales" on the Condensed Consolidated Statements of Operations. For the three months ended March 31, 2017, QEP had net income before income taxes related to the divested Pinedale properties of $28.0 million. As a part of the Pinedale Divestiture, QEP agreed to reimburse the buyer for certain deficiency charges it incurs related to gas processing and NGL transportation and fractionation contracts between the effective date of the sale and December 31, 2019, in an aggregate amount not to exceed $45.0 million. As of March 31, 2018, the liability associated with estimated future payments for this commitment was $27.3 million, of which $22.9 million is reported on the Condensed Consolidated Balance Sheets within "Accounts payable and accrued expenses" and $4.4 million is reported on the Condensed Consolidated Balance Sheets within "Other long-term liabilities". Other Divestitures During the three months ended March 31, 2018, QEP received proceeds of $33.3 million and recorded a pre-tax gain on sale of $2.5 million, primarily related to the divestiture of properties outside our main operating areas in the Williston Basin and Other Northern area. The gains and losses were recorded within "Net gain (loss) from asset sales" on the Condensed Consolidated Statements of Operations.

Acquisitions

During the three months ended March 31, 2018, QEP acquired various oil and gas properties, which primarily included proved and unproved leasehold acreage in the Permian Basin for an aggregate purchase price of $36.2 million, subject to customary purchase price adjustments. Of the $36.2 million, $35.7 million was related to acquisitions from various persons who owned additional oil and gas interests in certain properties included in the 2017 acquisition of oil and gas properties in the Permian Basin (the 2017 Permian Basin Acquisition) on substantially the same terms and conditions as the 2017 Permian Basin Acquisition in the fourth quarter of 2017.

During the three months ended March 31, 2017, QEP acquired various oil and gas properties, which primarily included proved and unproved leasehold acreage and additional surface acreage in the Permian Basin, for an aggregate purchase price of $68.2 million. In conjunction with these acquisitions, the Company recorded $5.3 million of goodwill, which was subsequently impaired in 2017.

2018 Strategic Initiatives

In February 2018, QEP's Board of Directors unanimously approved certain strategic and financial initiatives (Strategic Initiatives) including plans to market its assets in the Williston Basin, the Uinta Basin and Haynesville/Cotton Valley and focus its activities in the Permian Basin. As a part of this process, in February 2018, the Company engaged advisors to assist with the divestitures of its Williston Basin and Uinta Basin assets and has provided data for potential buyers in April 2018. The assets will be considered held for sale once it is deemed unlikely that there will be any significant changes to QEP's divestiture plan, which QEP believes will be upon the execution of purchase and sale agreements.

Pinedale Divestiture

In September 2017, QEP sold its assets in Pinedale (the Pinedale Divestiture), for net cash proceeds (after purchase price adjustments) of $718.2 million, subject to additional post-closing purchase price adjustments. For the three months ended March 31, 2018, QEP recorded a pre-tax gain on sale of $1.0 million, due to post-closing purchase price adjustments, which were recorded within "Net gain (loss) from asset sales" on the Condensed Consolidated Statements of Operations. For the three months ended March 31, 2017, QEP had net income before income taxes related to the divested Pinedale properties of $28.0 million.

As a part of the Pinedale Divestiture, QEP agreed to reimburse the buyer for certain deficiency charges it incurs related to gas processing and NGL transportation and fractionation contracts between the effective date of the sale and December 31, 2019, in an aggregate amount not to exceed $45.0 million. As of March 31, 2018, the liability associated with estimated future payments for this commitment was $27.3 million, of which $22.9 million is reported on the Condensed Consolidated Balance Sheets within "Accounts payable and accrued expenses" and $4.4 million is reported on the Condensed Consolidated Balance Sheets within "Other long-term liabilities".

Other Divestitures

During the three months ended March 31, 2018, QEP received proceeds of $33.3 million and recorded a pre-tax gain on sale of $2.5 million, primarily related to the divestiture of properties outside our main operating areas in the Williston Basin and Other Northern area.

The gains and losses were recorded within "Net gain (loss) from asset sales" on the Condensed Consolidated Statements of Operations.