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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

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