Document and Entity Information Document
Jan. 23, 2020
Document Information [Line Items]  
Entity Address, Address Line One 14817 Oak Lane,
Entity Central Index Key 0001504008
Entity Incorporation, State or Country Code DE
Document Type 8-K
Document Period End Date Jan. 23, 2020
Entity Registrant Name BankUnited, Inc.
City Area Code 305
Local Phone Number 569-2000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity File Number 001-35039
Entity Tax Identification Number 27-0162450
Entity Address, City or Town Miami Lakes,
Entity Address, State or Province FL
Entity Address, Postal Zip Code                                                 33016
Amendment Flag false
Document Information [Line Items]  
Title of 12(b) Security Common Stock, $0.01 Par Value
Trading Symbol BKU
Security Exchange Name NYSE