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Convertible Debt 2022 Conversion Feature, Fair Value

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Convertible due 2021 - Bond Hedge, Fair Value

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Convertible due 2022 - Bond Hedge, Fair Value

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value portion of investments accounted under the cost method.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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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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Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

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Fair Values (Details of Book Value and Fair Value of Financial Instruments) (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible due 2021 - Bond Hedge	$ 0	$ 1,028,000
Cash and cash equivalents	89,511,000	116,907,000	$ 122,398,000	$ 176,528,000
Convertible 2022 note hedge asset	0	2,062,000
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	89,511,000	116,907,000
Other investments	86,000	90,000
Installment receivables, net of reserves	1,170,000	1,796,000
Long-term debt (including current maturities of long-term debt)	(284,189,000)	(255,645,000)
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	89,511,000	116,907,000
Other investments	86,000	90,000
Installment receivables, net of reserves	1,170,000	1,796,000
Long-term debt (including current maturities of long-term debt)	(248,234,000)	(181,928,000)
Convertible Debt 2022 Note Hedge [Domain] \| Other Long-Term Assets [Member] \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	2,062,000
Convertible Debt 2022 Note Hedge [Domain] \| Other Long-Term Assets [Member] \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	2,062,000
Convertible Debt 2021 Note Hedge [Domain] \| Other Long-Term Assets [Member] \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	1,028,000
Convertible Debt 2021 Note Hedge [Domain] \| Other Long-Term Assets [Member] \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	0	1,028,000
Convertible Debt 2022 Conversion Feature [Domain] \| Other Debt Obligations [Member] \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	2,611,000
Convertible Debt 2022 Conversion Feature [Domain] \| Other Debt Obligations [Member] \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	2,611,000
Foreign currency forward contracts \| Other Current Assets \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1,972,000	1,020,000
Foreign currency forward contracts \| Other Current Assets \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1,972,000	1,020,000
Foreign currency forward contracts \| Accrued Expenses \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(428,000)	(219,000)
Foreign currency forward contracts \| Accrued Expenses \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(428,000)	(219,000)
Convertible Debt Conversion Feature [Member] \| Other Debt Obligations [Member] \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	1,458,000
Convertible Debt Conversion Feature [Member] \| Other Debt Obligations [Member] \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	0	1,458,000
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 1 [Member] \| Foreign currency forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net	0	0
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 1 [Member] \| Convertible Debt 2022 Conversion Feature [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net		0
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 1 [Member] \| Convertible Debt Bond Hedge [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net		0
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 2 \| Convertible Debt 2022 Conversion Feature [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible Debt Conversion Feature	0	(2,611,000)
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 2 \| Foreign currency forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net	1,544,000	801,000
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 2 \| Convertible Debt Conversion Feature [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible 2021 debt conversion liability	0	1,458,000
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 2 \| Convertible Debt Bond Hedge [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible due 2021 - Bond Hedge	0	1,028,000
Convertible 2022 note hedge asset	0	2,062,000
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 3 [Member] \| Foreign currency forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net	$ 0	0
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 3 [Member] \| Convertible Debt 2022 Conversion Feature [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net		0
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 3 [Member] \| Convertible Debt Bond Hedge [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net		$ 0