Note 8 - Fair Value of Financial Instruments - Effect of Cash Flow Hedge on Statement of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Balance in Other comprehensive income (loss) beginning of period		$ 1,998,461	$ 1,941,437	$ 1,515,410
Balance in Other comprehensive income (loss) end of period		2,020,975	1,998,461	1,941,437
Cross Currency Swap [Member] | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member]
Balance in Other comprehensive income (loss) beginning of period		5,745	3,366	0
Gain or (loss) recognized in Other comprehensive income (loss) (1)	[1]	(38,628)	12,880	24,553
Amount reclassified from Other comprehensive income (loss) into earnings		36,803	(10,501)	(21,187)
Balance in Other comprehensive income (loss) end of period		$ 3,920	$ 5,745	$ 3,366

[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.