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Notes Payable - Convertible (Details) (USD $) | 12 Months Ended | 1 Months Ended | 12 Months Ended |  |  |  | 12 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Sep. 28, 2012 2026 Notes | Dec. 31, 2013 2026 Notes | Dec. 31, 2012 2026 Notes | Dec. 31, 2013 2028 Notes | Sep. 30, 2013 2028 Notes | Jul. 11, 2013 2028 Notes | Dec. 31, 2012 2028 Notes | Dec. 31, 2013 Convertible Debt | Dec. 31, 2012 Convertible Debt | Dec. 31, 2011 Convertible Debt | Sep. 28, 2012 Convertible Debt 2026 Notes
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Proceeds |  |  |  |  | $ 168,650,000 |  | $ 228,576,000 |  |  |  |  |  |  |
Stated Interest Rate |  |  |  |  | 3.95% |  | 5.125% |  |  |  |  |  |  |
Effective Interest Rate |  |  |  |  | 5.84% |  | 7.192% |  |  |  |  |  |  |
Debt Issuance Costs |  |  |  |  | 3,850,000 |  | 5,459,000 |  |  |  |  |  |  |
Original Principal |  |  |  |  | 172,500,000 |  | 234,035,000 |  |  |  |  |  |  |
Repurchases |  |  |  |  | (33,800,000) |  | (11,000,000) |  |  |  |  |  |  |
Settled |  |  |  | (123,163,000) | (138,700,000) |  | (223,035,000) |  |  |  |  |  |  |
Outstanding principal balance | 0 | 238,572,000 |  |  | 0 | 15,537,000 | 0 | 222,905,000 | 130,000 | 223,035,000 |  |  |  |
Repayments of Notes Payable | 0 | 50,000,000 | 0 |  |  | 20,702,000 | 226,427,000 |  |  |  |  |  |  |
Common stock, shares issued | 121,991,677 | 121,991,677 |  |  |  |  | 2,407,911 |  |  |  |  |  |  |
Repayment of notes payable - convertible | 246,797,000 | 164,649,000 | 0 | 164,649,000 |  |  |  |  |  |  |  |  |  |
Carrying value of equity component | 0 | (22,193,000) |  |  |  |  |  |  |  |  |  |  |  |
Remaining unamortized debt discount | 0 | (2,072,000) |  |  |  |  |  |  |  |  |  |  |  |
Net carrying value of convertible debt | 0 | 214,307,000 |  |  |  |  |  |  |  |  |  |  |  |
Noncash interest charges |  |  |  |  |  |  |  |  |  |  | 2,072,000 | 4,291,000 | 5,837,000 |
Contractual interest expense |  |  |  |  |  |  |  |  |  |  | 5,400,000 | 15,744,000 | 16,909,000 |
Amortization of notes payable discount | 3,188,000 | 4,976,000 | 6,191,000 |  |  |  |  |  |  |  | 566,000 | 1,149,000 | 1,583,000 |
Interest Expense, Debt |  |  |  |  |  | 137,000 | 195,000 |  |  |  | 8,038,000 | 21,184,000 | 24,329,000 |
Equity component of convertible debt | 93,450,000 | 41,486,000 |  |  |  |  |  |  |  |  |  |  |  | 41,486,000
Adjustments to Additional Paid in Capital, Other |  |  |  |  |  | $ 5,028,000 | $ 3,197,000 |  |  |  |  |  |  |

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- Definition Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 25 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=26072319&loc=SL6014347-161799 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 65 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7667209&loc=SL6052262-162007 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition For an unclassified balance sheet, the amount as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Such amount is before the consideration of accumulated amortization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 + Details
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