Convertible Subordinated Notes (5 Year Maturity For Convertible Subordinated Notes) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Mar. 19, 2014
Debt Instrument [Line Items]
Principal Maturity, 2016	$ 12,012,000
Principal Maturity, 2017	13,499,000
Principal Maturity, 2018	15,184,000
Principal Maturity, 2019	167,168,000
Principal Maturity, 2020	383,000
Principal Maturity, 2020 and thereafter	220,000
Carrying value of the liability component	208,466,000
Discount Amortization, 2016	(3,867,000)
Discount Amortization, 2017	(4,328,000)
Discount Amortization, 2018	(4,844,000)
Discount Amortization, 2019	(5,422,000)
Discount Amortization, 2020	(6,068,000)
Discount Amortization, 2021 and thereafter	(1,225,000)
Discount Amortization, Total	(25,754,000)
Convertible subordinated notes
Debt Instrument [Line Items]
Principal Maturity, 2016	0
Principal Maturity, 2017	0
Principal Maturity, 2018	0
Principal Maturity, 2019	0
Principal Maturity, 2020	0
Principal Maturity, 2020 and thereafter	143,750,000
Carrying value of the liability component	143,750,000	$ 143,750,000	$ 143,750,000
Discount Amortization, Total	(25,754,000)	(29,208,000)
Present Value, 2016	(3,867,000)
Present Value, 2017	(4,328,000)
Present Value, 2018	(4,844,000)
Present Value, 2019	(5,422,000)
Present Value, 2020	(6,068,000)
Present Value, 2021 and thereafter	142,525,000
Carrying value of the liability component	$ 117,996,000	$ 114,542,000

Convertible Subordinated Notes Aggregate Maturity

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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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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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