CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 10, 2018	Dec. 31, 2017
Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and Equivalents	$ 269,599	$ 62,028	$ 53,112	$ 51,006	$ 29,600
Restricted Cash	6,019	8,335	5,031	13,472	13,841	$ 8,308
Total Cash, Cash Equivalents and Restricted Cash	$ 275,618	$ 70,363	$ 58,143	$ 64,478	$ 43,441	$ 8,308	$ 16,999

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, 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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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