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Cover
Dec. 03, 2025
Cover [Abstract]  
Document Type 8-K/A
Document Period End Date Dec. 03, 2025
Entity Registrant Name FIRSTSUN CAPITAL BANCORP
Entity Incorporation, State or Country Code DE
Entity File Number 001-42175
Entity Tax Identification Number 81-4552413
Entity Address, Address Line One 1400 16th Street
Entity Address, Address Line Two Suite 250
Entity Address, City or Town Denver
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80202
City Area Code 303
Local Phone Number 831-6704
Written Communications true
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0001709442
Amendment Flag true
Trading Symbol FSUN
Security Exchange Name NASDAQ
Title of 12(b) Security Common Stock, $.0001 Par Value
Amendment Description This Current Report on Form 8-K/A (the “Amendment”) of FirstSun Capital Bancorp (the “Company”) amends the Current Report on Form 8-K filed by the Company on December 4, 2025 (the “Original Report”). The sole purpose of the Amendment is the insertion of the correct date for the signature in the Original Report. No other revisions have been made to the Original Report.