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Long-Term Debt (Tables) | 12 Months Ended
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Dec. 31, 2021
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments [Table Text Block] | The following table summarizes the Company’s total outstanding balance on its revolving credit facility, Senior Secured Notes net of unamortized discount and deferred financing costs, and Senior Unsecured Notes net of unamortized deferred financing costs, as of December 31, 2021, and 2020:
| As of December 31, 2021 |  | As of December 31, 2020
| (in thousands)
Revolving credit facility | $ | — |  |  | $ | 93,000 |
Senior Secured Notes (1) | 407,712 |  |  | 460,656 |
Senior Unsecured Notes (1) | 1,673,452 |  |  | 1,660,663 |
Total | $ | 2,081,164 |  |  | $ | 2,214,319 |
____________________________________________ (1) Senior Secured Notes and Senior Unsecured Notes are defined below.
Borrowing Base Utilization Grid, Credit Facility [Table Text Block] |
Borrowing Base Utilization Percentage |  | <25% |  | ≥25% <50% |  | ≥50% <75% |  | ≥75% <90% |  | ≥90%
Eurodollar Loans (1) |  | 1.750 | % |  | 2.000 | % |  | 2.500 | % |  | 2.750 | % |  | 3.000 | %
ABR Loans or Swingline Loans |  | 0.750 | % |  | 1.000 | % |  | 1.500 | % |  | 1.750 | % |  | 2.000 | %
Commitment Fee Rate |  | 0.375 | % |  | 0.375 | % |  | 0.500 | % |  | 0.500 | % |  | 0.500 | %
____________________________________________ (1) LIBOR was discontinued as a global reference rate for new loans and contracts after December 31, 2021. The Credit Agreement specifies that if LIBOR is no longer a widely used benchmark rate, or if it is no longer used for determining interest rates for loans in the United States, a replacement interest rate that fairly reflects the cost to the lenders of funding loans shall be established by the Administrative Agent, as defined in the Credit Agreement, in consultation with the Company. During 2022, in advance of the maturity date of the Company’s existing Credit Agreement, the Company expects to enter into a new credit agreement that will, in addition to other negotiated terms, conditions, agreements, and other provisions, specify a new interest rate for Eurodollar loans. The Company does not expect to incur borrowings in the form of Eurodollar loans prior to that time. Please refer to Note 1 – Summary of Significant Accounting Policies for discussion of FASB ASU 2020-04 and ASU 2021-01, which provide guidance related to reference rate reform.
Schedule of Credit Agreement Facilities [Table Text Block] | The following table presents the outstanding balance, total amount of letters of credit outstanding, and available borrowing capacity under the Credit Agreement as of February 10, 2022, December 31, 2021, and December 31, 2020:
| As of February 10, 2022 |  | As of December 31, 2021 |  | As of December 31, 2020
| (in thousands)
Revolving credit facility (1) | $ | — |  |  | $ | — |  |  | $ | 93,000 |
Letters of credit (2) | 2,500 |  |  | 2,500 |  |  | 42,000 |
Available borrowing capacity | 1,097,500 |  |  | 1,097,500 |  |  | 965,000 |
Total aggregate lender commitment amount | $ | 1,100,000 |  |  | $ | 1,100,000 |  |  | $ | 1,100,000 |
____________________________________________ (1) Unamortized deferred financing costs attributable to the revolving credit facility are presented as a component of the other noncurrent assets line item on the accompanying balance sheets and totaled $2.7 million and $4.3 million as of December 31, 2021, and 2020, respectively. These costs are being amortized over the term of the revolving credit facility on a straight-line basis. (2) Letters of credit outstanding reduce the amount available under the revolving credit facility on a dollar-for-dollar basis.
Schedule Of Long-term Debt Instruments, Secured | Senior Secured Notes, net of unamortized discount and deferred financing costs, included within the Senior Notes, net line item on the accompanying balance sheets as of December 31, 2021, and December 31, 2020, consisted of the following (collectively referred to as “Senior Secured Notes”):
| As of December 31, 2021
| Principal Amount |  | Unamortized Debt Discount |  | Unamortized Deferred Financing Costs |  | Net
| (in thousands)
10.0% Senior Secured Notes due 2025 | $ | 446,675 |  |  | $ | 30,236 |  |  | $ | 8,727 |  |  | $ | 407,712 |
| As of December 31, 2020
| Principal Amount |  | Unamortized Debt Discount |  | Unamortized Deferred Financing Costs |  | Net
| (in thousands)
1.50% Senior Secured Convertible Notes due 2021 | $ | 65,485 |  |  | $ | 1,828 |  |  | $ | 175 |  |  | $ | 63,482 |
10.0% Senior Secured Notes due 2025 | 446,675 |  |  | 37,943 |  |  | 11,558 |  |  | 397,174 |
Total | $ | 512,160 |  |  | $ | 39,771 |  |  | $ | 11,733 |  |  | $ | 460,656 |
Schedule Of Long-term Debt Instruments, Unsecured | Senior Unsecured Notes, net of unamortized deferred financing costs, included within the Senior Notes, net line item on the accompanying balance sheets as of December 31, 2021, and 2020, consisted of the following:
| As of December 31, 2021 |  | As of December 31, 2020
| Principal Amount |  | Unamortized Deferred Financing Costs |  | Principal Amount, Net |  | Principal Amount |  | Unamortized Deferred Financing Costs |  | Principal Amount, Net
| (in thousands)
6.125% Senior Notes due 2022 | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 212,403 |  |  | $ | 855 |  |  | $ | 211,548 |
5.0% Senior Notes due 2024 | 104,769 |  |  | 403 |  |  | 104,366 |  |  | 277,034 |  |  | 1,576 |  |  | 275,458 |
5.625% Senior Notes due 2025 | 349,118 |  |  | 2,160 |  |  | 346,958 |  |  | 349,118 |  |  | 2,792 |  |  | 346,326 |
6.75% Senior Notes due 2026 | 419,235 |  |  | 3,270 |  |  | 415,965 |  |  | 419,235 |  |  | 3,970 |  |  | 415,265 |
6.625% Senior Notes due 2027 | 416,791 |  |  | 3,949 |  |  | 412,842 |  |  | 416,791 |  |  | 4,725 |  |  | 412,066 |
6.5% Senior Notes due 2028 | 400,000 |  |  | 6,679 |  |  | 393,321 |  |  | — |  |  | — |  |  | — |
Total | $ | 1,689,913 |  |  | $ | 16,461 |  |  | $ | 1,673,452 |  |  | $ | 1,674,581 |  |  | $ | 13,918 |  |  | $ | 1,660,663 |
Schedule of Long-Term Debt Instruments, Senior Notes Tendered | The following table summarizes the principal amounts of the Senior Unsecured Notes tendered as of the Settlement Date:
Title of Senior Unsecured Notes Tendered |  | Principal Amount of Senior Unsecured Notes Tendered
|  | (in thousands)
6.125% Senior Notes due 2022 |  | $ | 141,701 |
5.0% Senior Notes due 2024 |  | 155,339 |
5.625% Senior Notes due 2025 |  | 150,882 |
6.75% Senior Notes due 2026 |  | 80,765 |
6.625% Senior Notes due 2027 |  | 83,209 |
Total |  | $ | 611,896 |

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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