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Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	(21) SUBSEQUENT EVENTS In mid July, we closed on two agreements to sell a proportionately reduced 2% overriding royalty in certain Pennsylvania leases for gross proceeds of $600.0 million. The properties encompass approximately 350,000 net surface acreage. We do not expect a gain or loss will be recorded on these two transactions.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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