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Exit Activity Costs and Asset Impairments (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) facility	Dec. 31, 2017 USD ($) facility	Dec. 31, 2016 USD ($) facility
Restructuring and Related Activities [Abstract]
Exit activity charges	$ 4,819	$ 5,495	$ 13,747
Restructuring impairment charges	1,344	(1,630)	7,530
Exit activity costs (recoveries), net	$ 3,475	$ 7,125	$ 6,217
Number of consolidated facilities to be closed | facility	4	3	7

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Restructuring and Related Cost, Number of Facilities to be Closed

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Amount of restructuring charges, remediation cost, and asset impairment loss.

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