Acquisition and Divestiture-Related Activities Divestiture (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Divestiture-Related Activities [Abstract]
(Losses) gains on divestitures, net	$ (587)	$ 8,058	$ (9,683)	$ 16,199
Impairment losses	(892)	(88)	(5,497)	(882)
(Losses) gains on divestitures and impairment charges, net	$ (1,479)	$ 7,970	$ (15,180)	$ 15,317

Amount, before tax, of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a disposal group. Excludes discontinued operations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Balance Type:	debit
Period Type:	duration