Quarterly report pursuant to Section 13 or 15(d)

COMMON AND PREFERRED STOCK - Changes in Equity (Details)

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COMMON AND PREFERRED STOCK - Changes in Equity (Details) - shares
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Changes in the number of shares of common stock outstanding [Roll forward]      
Beginning Balance (in shares) 378,333,070 66,792,000 66,792,000
Repurchases of Common Stock (in shares) (5,635,000) 0 (7,360,000)
Stock Options Exercised - Net (in shares) 0   63,000
Restricted Stock Grants (in shares) 3,160,000   3,295,000
Debt Exchanges (in shares) 0   136,064,000
Equity Offerings (in shares) 0   96,926,000
Stock Consideration for Acquisitions of Oil and Natural Gas Properties (in shares) 0   83,731,000
Contingent Consideration Settlements (in shares) 1,168,000   0
Other Surrenders - Tax Obligations (in shares) (221,000)   (267,000)
Other Forfeitures (in shares) (5,000)   (911,000)
Ending Balance (in shares) 376,800,478   378,333,070