Related Party Transactions	12 Months Ended
Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Certain officers of the Company own or control entities that own working and royalty interests in wells operated by the Company. The Company paid revenues to these affiliates, including royalties, of $0.5 million, $0.5 million, and $0.4 million and received payments from these affiliates of $0.2 million, $0.3 million, and $0.3 million during the years ended December 31, 2018, 2017, and 2016, respectively, relating to the operations of the respective properties. At December 31, 2018 and 2017, approximately $67,000 and $58,000 was due from these affiliates, respectively, and approximately $41,000 and $48,000 was due to these affiliates, respectively, relating to these transactions. The Company allows certain affiliates to use its corporate aircraft and crews and has used the aircraft of those same affiliates from time to time in order to facilitate efficient transportation of Company personnel. The rates charged between the parties vary by type of aircraft used. In 2016, the Company also purchased an existing prepaid maintenance account from an affiliate for use in major engine overhaul to be applied as needed for corporate aircrafts. For usage during 2018, 2017, and 2016, the Company charged affiliates approximately $12,900, $19,400, and $9,500, respectively, for use of its corporate aircraft crews, fuel, and reimbursement of expenses and received approximately $14,400, $18,600, and $6,800 from affiliates in 2018, 2017, and 2016, respectively. The Company was charged approximately $598,000, $460,000, and $292,000, respectively, by affiliates for use of their aircraft and reimbursement of expenses during 2018, 2017, and 2016 (including the aforementioned prepayment) and paid $529,000, $368,000, and $195,000 to the affiliates in 2018, 2017, and 2016, respectively. At December 31, 2018 and 2017, approximately $2,700 and $4,200 was due from an affiliate, respectively, and approximately $161,000 and $92,000 was due to an affiliate, respectively, relating to these transactions. The Company capitalized costs of $0.1 million in 2016 associated with drilling rig services and demobilization of a drilling rig provided by an affiliate. The total amount paid to the affiliate, a portion of which was billed to other interest owners, was $0.1 million for the year ended December 31, 2016. No amounts were due to the affiliate at December 31, 2018 and 2017 related to the services.

Related Party Transactions

Certain officers of the Company own or control entities that own working and royalty interests in wells operated by the Company. The Company paid revenues to these affiliates, including royalties, of $0.5 million, $0.5 million, and $0.4 million and received payments from these affiliates of $0.2 million, $0.3 million, and $0.3 million during the years ended December 31, 2018, 2017, and 2016, respectively, relating to the operations of the respective properties. At December 31, 2018 and 2017, approximately $67,000 and $58,000 was due from these affiliates, respectively, and approximately $41,000 and $48,000 was due to these affiliates, respectively, relating to these transactions.

The Company allows certain affiliates to use its corporate aircraft and crews and has used the aircraft of those same affiliates from time to time in order to facilitate efficient transportation of Company personnel. The rates charged between the parties vary by type of aircraft used. In 2016, the Company also purchased an existing prepaid maintenance account from an affiliate for use in major engine overhaul to be applied as needed for corporate aircrafts. For usage during 2018, 2017, and 2016, the Company charged affiliates approximately $12,900, $19,400, and $9,500, respectively, for use of its corporate aircraft crews, fuel, and reimbursement of expenses and received approximately $14,400, $18,600, and $6,800 from affiliates in 2018, 2017, and 2016, respectively. The Company was charged approximately $598,000, $460,000, and $292,000, respectively, by affiliates for use of their aircraft and reimbursement of expenses during 2018, 2017, and 2016 (including the aforementioned prepayment) and paid $529,000, $368,000, and $195,000 to the affiliates in 2018, 2017, and 2016, respectively. At December 31, 2018 and 2017, approximately $2,700 and $4,200 was due from an affiliate, respectively, and approximately $161,000 and $92,000 was due to an affiliate, respectively, relating to these transactions.

The Company capitalized costs of $0.1 million in 2016 associated with drilling rig services and demobilization of a drilling rig provided by an affiliate. The total amount paid to the affiliate, a portion of which was billed to other interest owners, was $0.1 million for the year ended December 31, 2016. No amounts were due to the affiliate at December 31, 2018 and 2017 related to the services.