Business And Summary Of Significant Accounting Policies - Reclass Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales									$ 705,698	$ 461,545	$ 449,228
Research and development	$ 601	$ 518	$ 581	$ 429	$ 373	$ 1,329	$ 933	$ 820	2,129	3,456	2,534
Selling and administrative expenses	15,683	14,234	16,239	15,876	15,389	13,293	12,169	11,656	62,032	52,506	58,515
Other (income) expense, net	828	1,502	(974)	2,005	(6,426)	(404)	1,423	3,304	$ 3,361	(2,104)	(4,266)
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales										461,339	448,016
Research and development	601	518	581	429	159	1,338	943	829		2,951	2,399
Selling and administrative expenses	15,683	14,234	16,239	15,876	12,280	13,322	12,195	11,683		49,479	57,784
Other (income) expense, net	$ 828	$ 1,502	$ (974)	$ 2,005	(1,976)	(643)	1,186	3,067		1,634	(2,188)
Effect of Accounting Change
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales										206	1,212
Research and development					532	(9)	(10)	(9)		505	135
Selling and administrative expenses					3,109	(29)	(26)	(27)		3,027	731
Other (income) expense, net					$ (4,450)	$ 239	$ 237	$ 237		$ (3,738)	$ (2,078)

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount of income (expense) related to nonoperating activities, classified as other.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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