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Interest Expense | 6 Months Ended
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Jun. 30, 2019
Interest Expense [Abstract] |
Interest Expense | Interest Expense The following table presents the components of the Company’s Interest expense:
| Three Months Ended June 30, |  | Six Months Ended June 30,
2019 |  | 2018 |  | 2019 |  | 2018
| (In thousands)
Contractual interest on Senior Notes | $ | 21,766 |  |  | $ | 21,766 |  |  | $ | 43,532 |  |  | $ | 43,531 |
Contractual interest on Subordinated Convertible Debentures | — |  |  | 5,067 |  |  | — |  |  | 20,015 |
Amortization of debt discount on Subordinated Convertible Debentures | — |  |  | 1,075 |  |  | — |  |  | 4,236 |
Amortization of debt issuance costs and other interest expense | 869 |  |  | 884 |  |  | 1,734 |  |  | 1,798 |
Total interest expense | $ | 22,635 |  |  | $ | 28,792 |  |  | $ | 45,266 |  |  | $ | 69,580 |
The Company settled its Subordinated Convertible Debentures in May 2018.

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- Definition The entire disclosure for interest income and interest expense for enterprises that derive a significant portion of their revenue from interest collected on investments, loans, and securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-12) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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