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Debt (Tables) | 6 Months Ended
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Jun. 30, 2019
Debt |
Schedule of debt | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
(In thousands) |  | 2019 |  | 2018
Term B Loan | ​ | $ | 13,750 | ​ | $ | 13,750
2023 Notes |  | ​ | 240,984 |  | ​ | 240,984
2025 Notes | ​ | ​ | 192,500 | ​ | ​ | 192,500
Total debt | ​ | ​ | 447,234 | ​ | ​ | 447,234
Unamortized debt discount and issuance costs | ​ | ​ | (60,559) | ​ | ​ | (64,379)
Net long-term debt |  | $ | 386,675 |  | $ | 382,855
Aggregate scheduled maturities of long-term debt | The aggregate scheduled maturities of our long-term debt as of June 30, 2019, are as follows: ​
​ | ​ | ​ | ​
(In thousands) |  | ​ |
Years ending December 31: | ​ | ​ |
2019 to 2021 | ​ | $ | —
2022 | ​ | ​ | 13,750
2023 | ​ | ​ | 240,984
Thereafter | ​ | ​ | 192,500
Total |  | $ | 447,234
​
2025 Notes |
Debt |
Summary of liability and equity components of convertible notes | Our outstanding 2025 Notes balances consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
(In thousands) |  | 2019 |  | 2018
Liability component |  | ​ | ​ |  | ​ | ​
Principal | ​ | $ | 192,500 | ​ | $ | 192,500
Debt discount and issuance costs, net |  | ​ | (58,261) |  | ​ | (61,766)
Net carrying amount |  | $ | 134,239 |  | $ | 130,734
Equity component, net | ​ | $ | 65,361 | ​ | $ | 65,361
Schedule of components of interest expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
(In thousands) |  | 2019 | ​ | 2018 | ​ | 2019 | ​ | 2018
Contractual interest expense | ​ | $ | 1,203 | ​ | $ | 1,203 |  | $ | 2,406 |  | $ | 2,393
Amortization of debt issuance costs | ​ | ​ | 136 | ​ | ​ | 125 | ​ | ​ | 269 | ​ | ​ | 248
Amortization of debt discount |  | ​ | 1,635 | ​ | ​ | 1,496 | ​ | ​ | 3,236 | ​ | ​ | 2,975
Total interest and amortization expense |  | $ | 2,974 | ​ | $ | 2,824 | ​ | $ | 5,911 | ​ | $ | 5,616
​

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- Definition Tabular disclosure of borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. Disclosures include, but are not limited to, principal amount, amortized premium or discount, and amount of liability and equity components. + References No definition available. + Details
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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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