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LONG-TERM DEBT (Details) - USD ($)	Jan. 19, 2022	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Outstanding balance, subordinated notes		$ 224,137,000	$ 126,026,000
Subordinated Debt
Debt Instrument [Line Items]
Outstanding balance, subordinated notes		62,000,000
3.5% Subordinated Notes Due 2032 | Subordinated Debt
Debt Instrument [Line Items]
Long-term debt	$ 100,000,000
Stated interest rate (percent)	0.035%
Basis spread on variable rate	2.15%
Net proceeds from issuance of subordinated notes	$ 98,000,000
Outstanding balance, subordinated notes		$ 98,000,000
Senior Notes 6.50% Due 2026 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (percent)		6.50%	6.50%
Outstanding balance, subordinated notes		$ 64,000,000	$ 64,000,000
Home Street Statutory Trust Subordinated Debt Securities | Subordinated Debt
Debt Instrument [Line Items]
Outstanding balance, subordinated notes			$ 62,000,000

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