Cover - shares	6 Months Ended
	Jun. 30, 2021	Aug. 02, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-35424
Entity Registrant Name	HOMESTREET, INC.
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	91-0186600
Entity Address, Address Line One	601 Union Street
Entity Address, Address Line Two	Suite 2000
Entity Address, City or Town	Seattle
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98101
City Area Code	206
Local Phone Number	623-3050
Title of 12(b) Security	Common Stock
Trading Symbol	HMST
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		20,794,666
Entity Central Index Key	0001518715
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false