Convertible Debentures and Credit Arrangements - Convertible Senior Debentures Narrative (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | ||||
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Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
Nov. 30, 2012 |
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Debt Instrument [Line Items] | ||||||
Deferred finance costs, noncurrent, net | $ 800,000 | |||||
Convertible Senior Debentures due 2018 | ||||||
Debt Instrument [Line Items] | ||||||
Aggregate face value of convertible senior debentures | $ 55,000,000 | $ 55,000,000 | $ 55,000,000.0 | |||
Interest rate on debentures | 5.25% | |||||
Fair value of debentures outstanding | 56,700,000 | 56,700,000 | ||||
Gross carrying amount of equity component | 6,400,000 | 6,400,000 | ||||
Unamortized discount | 2,300,000 | 2,300,000 | ||||
Deferred finance costs, noncurrent, net | 600,000 | 600,000 | ||||
Carrying value of liability component | 52,100,000 | 52,100,000 | ||||
Amortization of debt discount (premium) | $ 400,000 | $ 400,000 | $ 1,200,000 | $ 1,100,000 | ||
Debt instrument, interest rate, effective percentage | 8.70% | 8.70% |
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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount, after accumulated amortization, of debt discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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