Note 9 - Long-term Debt - Future Maturities (Details) $ in Thousands	Dec. 31, 2018 USD ($)
2019	$ 20,625
2020	26,892	[1]
2021	30,017	[1]
2022	630,017	[1]
2023	5,017	[1]
Thereafter	467,683	[1]
Total	$ 1,180,251	[1]

[1] Debt payments include principal repayment obligations as defined by the agreements described in note 9 and capital lease payment obligations.