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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Business And Summary Of Significant Accounting Policies - Reclass Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales									$ 563,864	$ 750,390	$ 705,698
Research and development									3,975	2,684	2,129
Selling and administrative expenses									67,913	63,674	62,032
Other (income) expense, net									$ 3,330	$ 5,203	$ 3,361
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Research and development	$ 1,903	$ 650	$ 710	$ 712	$ 723	$ 611	$ 713	$ 637
Selling and administrative expenses	17,918	19,062	16,001	14,932	17,346	15,708	15,394	15,226
Other (income) expense, net	$ 5,639	$ 694	$ 311	$ (3,314)	$ 4,561	$ (688)	$ 863	$ 467