Note 4 - Fair Value of Financial Instruments - Effect of Cash Flow Hedge on Statement of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Balance		$ 2,020,975	$ 1,998,461
Balance		2,337,029	2,014,849
Cross Currency Swap [Member] | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member]
Balance		3,920	5,745
Gain or (loss) recognized in Other comprehensive income (loss)	[1]	1,389	(8,587)
Amount reclassified from Other comprehensive income (loss) into earnings		(6,792)	6,682
Balance		$ (1,483)	$ 3,840

[1] The amount of gain or (loss) recognized in Other comprehensive income (loss) for the years ended December 31, 2022, 2021 and 2020 is net of tax of $0.5 million, $0.8 million and $1.1 million, respectively.