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Subsequent Events (Notes)
12 Months Ended
Dec. 31, 2020
Subsequent Events [Abstract]  
Subsequent Events [Text Block] Subsequent EventsWe announced on February 10, 2021 that our Board had declared a common stock cash dividend of $0.27 per share, payable on March 15, 2021 to holders of record as of the close of business on March 1, 2021.