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Discontinued Operations and Disposal Groups (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Discontinued Operations and Disposal Groups [Abstract] |  |
Disposal Group, Including Discontinued Operation, Consideration | $ 753,300 |
Disposal Group, Estimated Tax Indemnification Payment | $ 0 | $ 1,200

X
- Definition Disposal Group, Estimated Tax Indemnification Payment + References No definition available. + Details
Name: | nnbr_DisposalGroupEstimatedTaxIndemnificationPayment
Namespace Prefix: | nnbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant