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Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2018 - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in-Capital [Member]
Retained Earnings [Member]
Noncontrolling Interest [Member]
Balance (shares) at Dec. 31, 2017   269,295 1,332      
Balance at Dec. 31, 2017 $ 3,513,579 $ 2,668 $ (22,179) $ 2,677,217 $ 717,985 $ 137,888
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Permian Basin Acquisition issuance (shares)   46,000        
Permian Basin Acquisition issuance 371,220 $ 460   370,760    
Fees (2017 issuance of common stock) (shares)   0        
Fees (2017 issuance of common stock) (90) $ 0   (90)   0
Equity-based compensation (shares)   2,758        
Equity-based compensation 7,208 $ 26   7,116   66
Distributions to non-controlling interest owners (3,450)         (3,450)
Treasury stock - tax withholdings (shares)   690 690      
Treasury stock - tax withholdings (6,021)   $ (6,021)     0
Net income 3,712       590 3,122
Balance (shares) at Mar. 31, 2018   317,363 2,022      
Balance at Mar. 31, 2018 $ 3,886,158 $ 3,154 $ (28,200) $ 3,055,003 $ 718,575 $ 137,626