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Supplemental Cash Flow Information - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Continuing operations |  |  |  |
Cash and cash equivalents | $ 201,099 | $ 44,226 | $ 139,797 | $ 80,398
Restricted cash | 53,699 | 67,206 | 83,156 | 13,385
Cash, cash equivalents and restricted cash | 254,798 | 111,432 | 222,953 | 93,783
Discontinued operations |  |  |  |
Cash and cash equivalents | 14,005 | 53,085 | 57,322 | 63,834
Restricted cash | 3 | 17,168 | 19,263 | 27,040
Cash, cash equivalents and restricted cash | 14,008 | 70,253 | 76,585 | 90,874
Cash and cash equivalents, total | 215,104 | 97,311 | 197,119 | 144,232
Restricted cash, total | 53,702 | 84,374 | 102,419 | 40,425
Cash, cash equivalents and restricted cash, total | $ 268,806 | $ 181,685 | $ 299,538 | $ 184,657

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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