Supplemental Financial Information (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	$ 747	$ 0	$ 2,253	$ 0
Severance benefits expensed	400		100
Fixed assets write-offs	0	0	891	0
Inventory charges	40	0	320	0
Lease obligations	54	0	540	0
Professional services	1,072	0	1,594	0
Compensation & benefits	600	0	844	0
Insurance recoveries	359	$ 0	1,478	$ 0
UTIS Fire
Restructuring Cost and Reserve [Line Items]
Fixed assets write-offs			900
Inventory charges			300
Lease obligations	500
Professional services	1,100		1,600
Compensation & benefits	600		800
Insurance recoveries	400		1,500
Deductible	300		300
AES
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	700		2,300
Elastomeric Material Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	$ 0		$ 0

Catastrophic Event, Compensation And Benefits

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Catastrophic Event, Fixed Asset Write-Offs

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Catastrophic Event, Inventory Charges

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Catastrophic Event, Lease Obligations

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Insurance Deductible

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No definition available.

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The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

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-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
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A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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-Topic 946
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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, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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