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Note 1 - Basis of Presentation - Summary of Reconciliation of Cash, Cash Equivalents, and Restricted Cash in the Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash, cash equivalents and restricted cash, beginning of period	$ 268,108	$ 278,629
Cash and cash equivalents	388,024	184,673
Restricted cash	1,512	5,658
Total cash, cash equivalents and restricted cash, end of period	389,536	190,331
Net increase (decrease) in cash, cash equivalents and restricted cash	$ 121,428	$ (88,298)

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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