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Long-Term Debt and Long-Term Debt Payable to Related Parties (Tables) | 3 Months Ended
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Mar. 31, 2018
Debt Disclosure [Abstract] |
Long-Term Debt and Long-Term Debt Payable to Related Parties | Long-term debt and long-term debt payable to related parties consisted of the following (in thousands):
|  | March 31, 2018 |  |  | December 31, 2017 |
Converted Term Loan |  | $ | 400,000 |  |  | $ | 400,000 |
Term Loan |  |  | — |  |  |  | 270,710 |
Long-term debt |  |  | 400,000 |  |  |  | 670,710 |
2019 Promissory Notes |  |  | 300,000 |  |  |  | 300,000 |
2042 Promissory Notes |  |  | 112,500 |  |  |  | 112,500 |
Total long-term debt |  | $ | 812,500 |  |  | $ | 1,083,210 |
Carrying Amounts and Estimated Fair Values of Senior Notes | As of March 31, 2018 and December 31, 2017, the carrying amounts and estimated fair values of the Senior Notes were as follows (in thousands):
|  | March 31, 2018 |  |  | December 31, 2017 |
|  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
2019 Promissory Notes |  | $ | 300,000 |  |  | $ | 309,750 |  |  | $ | 300,000 |  |  | $ | 313,125 |
2042 Promissory Notes |  |  | 112,500 |  |  |  | 115,650 |  |  |  | 112,500 |  |  |  | 116,550 |
|  | $ | 412,500 |  |  | $ | 425,400 |  |  | $ | 412,500 |  |  | $ | 429,675 |

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