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Borrowings - Schedule of Selected Information Regarding Repurchase Agreements (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Deposits |  |  |
Maximum amount of outstanding agreements at any month end during the period | $ 22,771 | $ 23,768 | $ 25,342
Average amount outstanding during the period | $ 17,973 | $ 19,346 | $ 21,298
Weighted average interest rate for the period | 0.12% | 0.11% | 0.20%

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- Definition Securities Sold Under Agreements To Repurchase Maximum Outstanding At Any Month End + References No definition available. + Details
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Namespace Prefix: | nbhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Securities Sold Under Repurchase Agreements Average Balance + References No definition available. + Details
Name: | nbhc_SecuritiesSoldUnderRepurchaseAgreementsAverageBalance
Namespace Prefix: | nbhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Securities Sold Under Repurchase Agreements Weighted Average Interest Rate + References No definition available. + Details
Name: | nbhc_SecuritiesSoldUnderRepurchaseAgreementsWeightedAverageInterestRate
Namespace Prefix: | nbhc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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