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Restricted Cash (Tables)	6 Months Ended
Restricted Cash (Tables)	Jun. 30, 2020
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Schedule Of Cash And Cash Equivalents [Table Text Block]	June 30, December 31, 2020 2019 2019 2018 Cash and cash equivalents $ 322,497 $ 86,355 $ 123,524 $ 104,147 Restricted cash included in other current assets 85 — 353 — Restricted cash included in other assets 19,173 20,103 19,678 20,278 Cash, cash equivalents and restricted cash $ 341,755 $ 106,458 $ 143,555 $ 124,425