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2.25% Convertible Senior Notes Due 2019 (Tables) | 3 Months Ended
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Mar. 31, 2016
2.25% Convertible Senior Notes Due 2019 [Abstract] |
Carrying Amounts of Liability and Equity Components | ﻿
﻿ |  |  |  |  |
﻿ | March 31, 2016 |  | December 31, 2015
﻿ | (In thousands)
﻿Amount of the equity component (1) | $ | 45,808 |  | $ | 45,808
﻿ |  |  |  |  |
﻿2.25% convertible senior notes due 2019 | $ | 330,000 |  | $ | 330,000
﻿Unamortized debt discount (2) |  | (31,966) |  |  | (34,214)
﻿Unamortized transaction costs related to the debt component |  | (4,982) |  |  | (5,309)
﻿Contractual coupon interest accrual |  | 1,856 |  |  | 7,425
﻿Contractual coupon interest payment |  | — |  |  | (7,425)
﻿Net carrying amount | $ | 294,908 |  | $ | 290,477
﻿ ﻿ ﻿
| (1) |  | Net of $1,177 thousands of transaction costs related to the equity component of the Notes.
| (2) |  | As of March 3 1, 201 6, the remaining period over which the unamortized debt discount will be amortized is 3.25 years.
Summary of Interest Expense for Contractual Interest and Accretion of Debt Discount |
﻿ |  |  |  |  |
﻿ | Period ended March 31,
﻿ |  |  |  |
﻿ | 2016 |  | 2015
﻿ | (In thousands)
﻿Contractual coupon interest expense | $ | 1,856 |  | $ | 1,856
﻿Amortization of debt discount |  | 2,248 |  |  | 2,128
﻿Amortization of debt issuance costs |  | 327 |  |  | 299
﻿Total interest expense related to Notes | $ | 4,431 |  | $ | 4,283
﻿

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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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- References No definition available. + Details
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- Definition Tabular disclosure of interest income and expense, including, but not limited to, interest income and expense from investments, loans, and securities. + References No definition available. + Details
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