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Restricted Cash (Tables)	6 Months Ended
Restricted Cash (Tables)	Jun. 30, 2021
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Schedule Of Cash And Cash Equivalents [Table Text Block]	June 30, December 31, 2021 2020 2020 2019 Cash and cash equivalents $ 145,610 $ 322,497 $ 181,833 $ 123,524 Restricted cash included in other current assets — 85 62 353 Restricted cash included in other assets — 19,173 — 19,678 Cash, cash equivalents and restricted cash $ 145,610 $ 341,755 $ 181,895 $ 143,555