Dispositions	9 Months Ended
Sep. 30, 2018
Business Combinations [Abstract]
Dispositions	(4) DISPOSITIONS We recognized a pretax net loss on the sale of assets of $30,000 in third quarter 2018 compared to a pretax net gain of $102,000 in the same period of the prior year and a pretax net gain on the sale of assets of $149,000 in first nine months 2018 compared to a pretax net gain on the sale of assets of $23.5 million in first nine months 2017. 2018 Fourth Quarter Disposition Announcement On October 15, 2018, we announced the simultaneous signing and closing of an agreement to sell a proportionately reduced 1% royalty on all our current Washington County, Pennsylvania leases for $300.0 million in proceeds. The transaction is subject to customary terms and conditions. 2018 Dispositions Northern Oklahoma. In third quarter 2018, we sold properties in Northern Oklahoma for proceeds of $23.3 million and we recorded a net loss of $39,000 related to this sale, after closing adjustments. Other. In third quarter 2018, we sold miscellaneous inventory and other assets for proceeds of $673,000, resulting in a pretax gain of $9,000. In first six months 2018, we sold miscellaneous inventory and other assets for proceeds of $366,000 resulting in a pretax gain of $179,000. 2017 Dispositions Western Oklahoma. In first nine months 2017, we sold properties in Western Oklahoma for proceeds of $26.0 million and we recorded a gain of $22.1 million related to this sale, after closing adjustments and transaction fees. Other. In third quarter 2017, we sold miscellaneous inventory and other assets for proceeds of $295,000, resulting in a pretax gain of $102,000. In first six months 2017, we sold miscellaneous unproved property, inventory and other assets for proceeds of $1.3 million resulting in a pretax gain of $1.3 million.

(4) DISPOSITIONS

We recognized a pretax net loss on the sale of assets of $30,000 in third quarter 2018 compared to a pretax net gain of $102,000 in the same period of the prior year and a pretax net gain on the sale of assets of $149,000 in first nine months 2018 compared to a pretax net gain on the sale of assets of $23.5 million in first nine months 2017.

2018 Fourth Quarter Disposition Announcement

On October 15, 2018, we announced the simultaneous signing and closing of an agreement to sell a proportionately reduced 1% royalty on all our current Washington County, Pennsylvania leases for $300.0 million in proceeds. The transaction is subject to customary terms and conditions.

2018 Dispositions

Northern Oklahoma. In third quarter 2018, we sold properties in Northern Oklahoma for proceeds of $23.3 million and we recorded a net loss of $39,000 related to this sale, after closing adjustments.

Other. In third quarter 2018, we sold miscellaneous inventory and other assets for proceeds of $673,000, resulting in a pretax gain of $9,000. In first six months 2018, we sold miscellaneous inventory and other assets for proceeds of $366,000 resulting in a pretax gain of $179,000.

2017 Dispositions

Western Oklahoma. In first nine months 2017, we sold properties in Western Oklahoma for proceeds of $26.0 million and we recorded a gain of $22.1 million related to this sale, after closing adjustments and transaction fees.

Other. In third quarter 2017, we sold miscellaneous inventory and other assets for proceeds of $295,000, resulting in a pretax gain of $102,000. In first six months 2017, we sold miscellaneous unproved property, inventory and other assets for proceeds of $1.3 million resulting in a pretax gain of $1.3 million.