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2.25% Convertible Senior Notes Due 2019 | 3 Months Ended
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Mar. 31, 2016
2.25% Convertible Senior Notes Due 2019 [Abstract] |
2.25% Convertible Senior Notes Due 2019 | 9. 2.25% Convertible Senior Notes Due 2019 The following table presents the carrying amounts of the liability and equity components related to the 2.25% Convertible Senior Notes Due 2019 as of March 31, 2016: ﻿
﻿ |  |  |  |  |
﻿ | 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.
The following table presents the interest expense for the contractual interest, the accretion of debt discount and the amortization of debt issuance costs: ﻿
﻿ |  |  |  |  |
﻿ | 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 The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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