Note 1 - General and Basis of Presentation - Cash and Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Cash and cash equivalents	$ 130,006	$ 239,278	$ 376,630
Restricted cash and cash equivalents	111,127	104,166	88,449
Total Cash and cash equivalents and restricted cash and cash equivalents	$ 241,133	$ 343,444	$ 465,079	$ 536,778