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Borrowings (Narrative) (Details) (USD $)
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3 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | |
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Jun. 30, 2013
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Jun. 30, 2013
item
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Dec. 31, 2012
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Nov. 30, 2011
Institutional And Accredited Investor [Member]
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Jun. 30, 2013
Institutional And Accredited Investor [Member]
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| Debt Instrument [Line Items] | |||||
| Interest rate | 5.50% | 5.50% | 5.50% | ||
| Private placement of senior convertible notes | $ 27,540,000 | $ 27,540,000 | $ 90,960,000 | $ 152,000,000 | |
| Issuance costs | 6,634,000 | ||||
| Proceeds from issuance of notes | 145,366,000 | ||||
| Converted number of common stock shares | 69.9032 | ||||
| Initial conversion rate | $ 14.31 | $ 14.31 | |||
| Amount of notes converted | 20,800,000 | 63,420,000 | |||
| Common stock converted, shares | 1,454,000 | 4,433,000 | |||
| Loss on conversion of convertible debt | (3,538,000) | (9,253,000) | |||
| Debt instrument periodic payment | payable in cash semi-annually on June 15 and December 15 of each year | ||||
| Convertible Senior Notes principal amount | $ 1 | ||||
| Number shares that the notes are convertible | 1,925,000 | ||||
| Maturity date | Dec. 15, 2016 | ||||
| Notes issued with an effective yield | 5.96% | ||||
| Original issue discount | 98.00% | ||||
| Redeemable convertible securities maximum, shares | 2,455,000 | ||||
| Redeemable convertible securities price per share | $ 11.22 |
| X | ||||||||||
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- Definition
Gain loss on conversion of convertible debt. No definition available.
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- Definition
Original Issue Discount No definition available.
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- Definition
Redeemable Convertible Securities Maximum Shares No definition available.
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- Definition
Redeemable Convertible Securities Price Per Share No definition available.
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- Definition
Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The value of the financial instrument(s) that the original debt is being converted into 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of shares issued in exchange for 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 payments in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The price per share of the conversion feature embedded in the debt instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Description of the frequency of periodic payments (monthly, quarterly, annual). 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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- Details
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- Definition
Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Yield on the receivable, on which interest has been imputed, as calculated from its issuance value or purchase price. The calculated effective interest rate considers factors such as the issued face value or price paid for the receivable, the time period between payments, and the time until maturity [full receipt] of the receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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