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Summary of Significant Accounting Policies - Allocation of Fair Value Related to Acquisition (Details) - Covey Park Energy L L C - USD ($) $ in Thousands |  | 15 Months Ended
--- | --- | ---
Jul. 16, 2019 | Sep. 30, 2020
Consideration: |  |
Cash Paid | $ 700,000 |
Total Consideration | 1,067,808 |
Liabilities Assumed: |  |
Accounts Payable and Accrued Liabilities | 129,622 | $ 129,622
Derivative Financial Instruments | 388 | 388
Other Current Liabilities | 9,930 | 10,636
Measurement Period Adjustment, Other Current Liabilities |  | 706
Long Term Debt | 826,625 | 826,625
Covey Park Preferred Equity | 153,390 | 153,390
Non-current Derivative Financial Instruments | 186 | 186
Asset Retirement Obligations | 5,374 | 5,374
Deferred Income Taxes | 23,466 | 21,686
Measurement Period Adjustment, Deferred Income Taxes |  | (1,780)
Other Non-current Liabilities | 9,893 | 9,893
Liabilities Assumed | 1,158,874 | 1,157,800
Measurement Period Adjustment, Liabilities Assumed |  | (1,074)
Total Consideration and Liabilities Assumed | 2,226,682 | 2,225,608
Measurement Period Adjustment, Total Consideration and Liabilities Assumed |  | (1,074)
Assets Acquired: |  |
Cash and Cash Equivalents | 6,131 | 6,131
Accounts Receivable | 86,285 | 86,285
Current Derivative Financial Instruments | 51,004 | 51,004
Other Current Assets | 5,511 | 4,957
Measurement Period Adjustment, Other Current Assets |  | (554)
Proved Oil and Natural Gas Properties | 1,818,413 | 1,817,893
Measurement Period Adjustment, Proved Oil And Natural Gas Properties |  | (520)
Unproved Oil and Natural Gas Properties | 237,210 | 237,210
Other Property, Plant and Equipment | 2,262 | 2,262
Non-current Derivative Financial Instruments | 19,866 | 19,866
Total Assets Acquired | 2,226,682 | 2,225,608
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets |  | $ (1,074)
Common Stock |  |
Consideration: |  |
Fair Value of Stock Issued | 167,808 |
Series A Preferred Stock |  |
Consideration: |  |
Fair Value of Stock Issued | $ 200,000 |

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