Represents the amount transferred from available-for-sale securities to held-to-maturity.

No definition available.

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Namespace Prefix:	nbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
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- Details

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Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
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- Details

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Acquisition Activities - Intangible Assets (Details) - USD ($) $ in Millions	Oct. 01, 2022	Sep. 01, 2022
Rock Canyon Bank
Acquisition Activities
Acquired through acquisition		$ 52.9
Rock Canyon Bank \| Core Deposits
Acquisition Activities
Acquired through acquisition		$ 13.3
Amortization period		10 years
Rock Canyon Bank \| Small Business Administration ("SBA") servicing rights
Acquisition Activities
Acquired through acquisition		$ 3.1
Bank of Jackson Hole
Acquisition Activities
Acquired through acquisition	$ 111.3
Amount transferred from available-for-sale securities to held-to-maturity	$ 75.3
Amortization period	10 years
Bank of Jackson Hole \| Core Deposits
Acquisition Activities
Acquired through acquisition	$ 29.4
Bank of Jackson Hole \| Wealth management intangibles
Acquisition Activities
Acquired through acquisition	$ 1.3