Note 1 - General and Basis of Presentation - Cash and Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Cash and cash equivalents	$ 201,506	$ 195,808
Restricted cash and cash equivalents	97,455	91,962
Total Cash and cash equivalents and restricted cash and cash equivalents	$ 298,961	$ 287,770	$ 522,322	$ 226,676