Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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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.

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-Name Accounting Standards Codification

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The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Notes Payable (Liability and Equity Components of Convertible Senior Notes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Debt Instrument [Line Items]
Interest expense on convertible notes	$ 7,283	$ 8,741	$ 21,976	$ 28,126
September 2015 Notes [Member]
Debt Instrument [Line Items]
Principal amount of liability component	0		0		$ 22,377
Unamortized discount	0		0		(698)
Net carrying amount of liability component	$ 0		0		21,679
Amount by which the if-converted value exceeds principal			$ 0		$ 30,497
Interest rate, effective percentage	8.90%		8.90%
Convertible Debt [Member]
Debt Instrument [Line Items]
Interest expense on convertible notes	$ 400	$ 1,900	$ 1,400	$ 7,600