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Basis of Presentation (Details)	9 Months Ended
	Sep. 30, 2025 item
Basis of Presentation
Number of full service banking offices	90

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- Definition

Represents the number of full service banking offices.

+ References

No definition available.

+ Details

Name:	nbhc_NumberOfFullServiceBankingOffices
Namespace Prefix:	nbhc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration