Convertible Subordinated Notes (5 Year Maturity For Convertible Subordinated Notes) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Debt Instrument [Line Items]
Principal Maturity, 2015	$ 9,630
Principal Maturity, 2016	11,137
Principal Maturity, 2017	12,632
Principal Maturity, 2018	14,240
Principal Maturity, 2019	114,041
Principal Maturity, 2020 and thereafter	337
Carrying value of the liability component	162,017us-gaap_LongTermDebt
Discount Amortization, 2015	(3,455)
Discount Amortization, 2016	(3,867)
Discount Amortization, 2017	(4,328)
Discount Amortization, 2018	(4,844)
Discount Amortization, 2019	(5,422)
Discount Amortization, 2020 and thereafter	(7,292)
Discount Amortization, Total	(29,208)
Convertible subordinated notes
Debt Instrument [Line Items]
Principal Maturity, 2015	0
Principal Maturity, 2016	0
Principal Maturity, 2017	0
Principal Maturity, 2018	0
Principal Maturity, 2019	0
Principal Maturity, 2020 and thereafter	143,750
Carrying value of the liability component	143,750
Discount Amortization, Total	(29,208)
Present Value, 2015	(3,455)
Present Value, 2016	(3,867)
Present Value, 2017	(4,328)
Present Value, 2018	(4,844)
Present Value, 2019	(5,422)
Present Value, 2020 and thereafter	136,458
Carrying value of the liability component	$ 114,542

Convertible Subordinated Notes Aggregate Maturity

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Convertible Subordinated Notes Aggregate Maturity, After Year Five

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Convertible Subordinated Notes Aggregate Maturity, Next Twelve Months

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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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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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