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Other Real Estate Owned - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Other Real Estate Owned
OREO sales	$ 0	$ 1,100	$ 260	$ 2,916

X

- Definition

The cash inflow associated with the sale of other real estate not otherwise defined in the taxonomy net of gains (losses) realized.

+ References

No definition available.

+ Details

Name:	nbhc_ProceedsFromSaleOfOtherRealEstateNetOfGainsLosses
Namespace Prefix:	nbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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