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Lines of Credit and Long-Term Debt - Schedule of Long-Term Debt Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt	$ 180,172	$ 171,882
Less current portion	355	360
Long-term debt, less current portion	179,817	171,522
Convertible debt
Debt Instrument [Line Items]
Long-term debt	176,788	168,147
Notes payable
Debt Instrument [Line Items]
Long-term debt	3,328	3,655
Other
Debt Instrument [Line Items]
Long-term debt	$ 56	$ 80

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