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Lines of Credit and Long-Term Debt - Components of Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt	$ 171,882	$ 217,991
Less current portion	360	31,670
Long-term debt, less current portion	171,522	186,321
Convertible debt
Debt Instrument [Line Items]
Long-term debt	168,147	213,771
Notes payable
Debt Instrument [Line Items]
Long-term debt	3,655	4,089
Other
Debt Instrument [Line Items]
Long-term debt	$ 80	$ 131

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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