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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 23, 2024
Jun. 30, 2023
Document Document And Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Document Transition Report false    
Entity File Number 001-35654    
Entity Registrant Name NATIONAL BANK HOLDINGS CORP    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 27-0563799    
Entity Address, Address Line One 7800 East Orchard Road, Suite 300    
Entity Address, City or Town Greenwood Village    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80111    
City Area Code 303    
Local Phone Number 892-8715    
Title of 12(b) Security Class A Common Stock, Par Value $0.01    
Trading Symbol NBHC    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   37,785,081  
Entity Public Float     $ 1,082,000,000
Auditor Name KPMG LLP    
Auditor Firm ID 185    
Auditor Location Kansas City, MO    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001475841    
Amendment Flag false