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Subsequent Events (Notes)	12 Months Ended
Subsequent Events (Notes)	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events [Text Block]	SUBSEQUENT EVENTS On January 17, 2020, we used a portion of the net proceeds from the 2024 senior notes to redeem the remaining $151.8 million outstanding principal amount of the 2021 senior notes. For additional information regarding this transaction, see Note 9 to these consolidated financial statements.