Borrowings - Schedule of Selected Information Regarding Repurchase Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deposits
Maximum amount of outstanding agreements at any month end during the period	$ 23,768	$ 25,342	$ 23,574
Average amount outstanding during the period	$ 19,346	$ 21,298	$ 20,338
Weighted average interest rate for the period	0.11%	0.20%	0.11%

Securities Sold Under Agreements To Repurchase Maximum Outstanding At Any Month End

No definition available.

Name:	nbhc_SecuritiesSoldUnderAgreementsToRepurchaseMaximumOutstandingAtAnyMonthEnd
Namespace Prefix:	nbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration