Significant Concentrations	12 Months Ended
Dec. 31, 2018
Significant Concentrations [Abstract]
Significant Concentrations	SIGNIFICANT CONCENTRATIONS We have an agreement with ARM pursuant to which they market our oil, gas and NGLs. The sales are generally made under short-term contracts with month-to-month pricing based on published regional indices, adjusted for transportation, location and quality. ARM collects payments from purchasers, deducts their fee and remits the balance to us. In addition, ARM markets our firm transportation on the ONEOK Gas Transportation, L.L.C. system and the Panhandle Eastern Pipeline Company, LP system for a management fee. The AM Contributor owns 10% of ARM. During the Successor Period, we paid ARM $1.4 million for our share of the marketing fees. Receivables from ARM for sales on our behalf were $38.4 million and $22.4 million as of December 31, 2018 and 2017, respectively. During the Successor Period, the 2018 Predecessor Period and the years ended December 31, 2017 and 2016, sales managed by ARM on our behalf were $309.7 million, $28.8 million, $199.2 million and $114.8 million, respectively. Additionally, ARM provides us with strategic advice, execution and reporting services with respect to our derivatives activities. Fees paid to ARM for these services were $0.8 million, $0.1 million, $0.8 million and $1.9 million during the Successor Period, 2018 Predecessor Period, 2017 and 2016, respectively. We believe that the loss of any of our customers, or of our marketing agent ARM, would not have a material adverse effect on us because alternative purchasers are readily available.

SIGNIFICANT CONCENTRATIONS

We have an agreement with ARM pursuant to which they market our oil, gas and NGLs. The sales are generally made under short-term contracts with month-to-month pricing based on published regional indices, adjusted for transportation, location and quality. ARM collects payments from purchasers, deducts their fee and remits the balance to us. In addition, ARM markets our firm transportation on the ONEOK Gas Transportation, L.L.C. system and the Panhandle Eastern Pipeline Company, LP system for a management fee. The AM Contributor owns 10% of ARM. During the Successor Period, we paid ARM $1.4 million for our share of the marketing fees. Receivables from ARM for sales on our behalf were $38.4 million and $22.4 million as of December 31, 2018 and 2017, respectively. During the Successor Period, the 2018 Predecessor Period and the years ended December 31, 2017 and 2016, sales managed by ARM on our behalf were $309.7 million, $28.8 million, $199.2 million and $114.8 million, respectively.

Additionally, ARM provides us with strategic advice, execution and reporting services with respect to our derivatives activities. Fees paid to ARM for these services were $0.8 million, $0.1 million, $0.8 million and $1.9 million during the Successor Period, 2018 Predecessor Period, 2017 and 2016, respectively.

We believe that the loss of any of our customers, or of our marketing agent ARM, would not have a material adverse effect on us because alternative purchasers are readily available.