Derivatives Fair Value of Convertible Debt Hedges (Details)	12 Months Ended
Dec. 31, 2019 USD ($)
Convertible Subordinated Debt \| Convertible Senior Notes at 4.50% February 2022 [Domain]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Convertible Debt Conversion Feature Gain (Loss)	$ (6,193,000)

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.

No definition available.

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