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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2020
Fair Value Measurements |
Fair value of financial instruments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2020 | ​ | December 31, 2019
​ | ​ | Carrying | ​ | Fair | ​ | Carrying | ​ | Fair
​ | ​ | Value | ​ | Value | ​ | Value | ​ | Value
​ | (In thousands)
5.00% senior notes due September 2020 |  | $ | 139,142 | ​ | $ | 138,582 |  | $ | 282,046 | ​ | $ | 284,907
4.625% senior notes due September 2021 |  |  | 155,044 | ​ |  | 120,167 |  |  | 634,588 | ​ |  | 632,516
5.50% senior notes due January 2023 |  |  | 36,959 | ​ |  | 17,608 |  |  | 501,003 | ​ |  | 483,834
5.10% senior notes due September 2023 |  |  | 155,738 | ​ |  | 75,234 |  |  | 336,810 | ​ |  | 303,860
0.75% senior exchangeable notes due January 2024 |  |  | 484,035 | ​ |  | 200,894 |  |  | 472,603 | ​ |  | 431,503
5.75% senior notes due February 2025 | ​ |  | 775,186 | ​ |  | 315,191 |  |  | 781,502 | ​ |  | 705,040
7.25% senior notes due January 2026 | ​ |  | 600,000 | ​ |  | 379,686 |  |  | — | ​ |  | —
7.50% senior notes due January 2028 | ​ |  | 400,000 | ​ |  | 248,796 |  |  | — | ​ |  | —
2012 Revolving credit facility |  |  | — | ​ |  | — |  |  | 355,000 | ​ |  | 355,000
2018 Revolving credit facility |  |  | 560,000 | ​ |  | 560,000 |  |  | — | ​ |  | —
​ | ​ | ​ | 3,306,104 | ​ | $ | 2,056,158 | ​ | ​ | 3,363,552 | ​ | $ | 3,196,660
Less: current portion | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​
Less: deferred financing costs | ​ | ​ | 30,001 | ​ | ​ | ​ | ​ | ​ | 30,332 | ​ | ​ | ​
​ | ​ | $ | 3,276,103 | ​ | ​ | ​ | ​ | $ | 3,333,220 | ​ | ​ | ​

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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