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Fair Values (Details of Book Value and Fair Value of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 45,439	$ 83,745	$ 73,656	$ 105,298
Cash and cash equivalents	45,439	83,745
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	45,439	83,745
Debt Instrument, Fair Value Disclosure	(272,485)	(259,472)
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		83,745
Debt Instrument, Fair Value Disclosure	(335,279)	(308,129)
Convertible Senior Notes at 4.50% February 2022 \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	0	(2,632)
Convertible Senior Notes at 4.50% February 2022 \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	0	(2,642)
Convertible Senior Notes at 5.00% November 2024 \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(62,887)	(64,897)
Convertible Senior Notes at 5.00% November 2024 \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(72,341)	(72,140)
Series II Convertible Senior Notes at 5.00% November 2024 \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(63,963)	(74,165)
Series II Convertible Senior Notes at 5.00% November 2024 \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(75,764)	(78,251)
Other Notes and Capital Lease Obligations \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(19,089)	(36,060)
Other Notes and Capital Lease Obligations \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(19,089)	(36,060)
Convertible Senior Notes at 4.25% March 2026 \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(36,832)	(81,718)
Convertible Senior Notes at 4.25% March 2026 \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(80,898)	(119,036)
Convertible Senior Secured Notes at 5.68% July 2026 - July 26, 2022 Issuance [Domain] \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(25,369)	0
Convertible Senior Secured Notes at 5.68% July 2026 - July 26, 2022 Issuance [Domain] \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(27,463)	0
Secured Term Loans due July 2026 [Domain] \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(64,345)	0
Secured Term Loans due July 2026 [Domain] \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(59,724)	0
Convertible Subordinated Debt \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(473)	0
Convertible Subordinated Debt \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	(473)	0
Foreign currency forward contracts \| Other Current Assets \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2,626	386
Foreign currency forward contracts \| Other Current Assets \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2,626	386
Foreign currency forward contracts \| Accrued Expenses \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(4,890)	(1,938)
Foreign currency forward contracts \| Accrued Expenses \| Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	$ (4,890)	$ (1,938)