Note 6 - Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Total debt	$ 553,915	$ 524,727
Less: Current portion	(6,071)	(6,038)
Long-term debt	547,844	518,689
First Lien Credit Facilities [Member] \| Revolving Credit Facility [Member]
Total debt	30,000
First Lien Credit Facilities [Member] \| Term Loan [Member]
Total debt	522,135	522,989
Equipment Long-term Note Payable and Finance Leases [Member]
Total debt	$ 1,780	$ 1,737

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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