XML 62 R50.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

DEPOSITS - Narrative (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract] |  |
Time deposits, at or above FDIC insurance limit | $ 250 | $ 194
Public funds included in deposits | $ 283 | $ 255

X
- Definition Public Funds Included in Deposits + References No definition available. + Details
Name: | hmst_PublicFundsIncludedInDeposits
Namespace Prefix: | hmst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DepositsLiabilitiesBalanceSheetReportedAmountsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478353/942-405-50-1 + Details
Name: | us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant