XML 72 R58.htm IDEA: XBRL DOCUMENT
v3.22.4

LOANS AND CREDIT QUALITY - Narrative (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) portfolioSegment | Dec. 31, 2021 USD ($)
Financing Receivable, Impaired [Line Items] |  |
Number of portfolio segments | portfolioSegment | 2 |
Allowance for unfunded commitments | $ 2,200 | $ 2,400
Accrued interest receivable | 26,900 | 17,800
Loans held for investment ("LHFI") (net of allowance for credit losses of $41,500 and $47,123) | $ 7,384,820 | $ 5,495,726
California | Multifamily |  |
Financing Receivable, Impaired [Line Items] |  |
Percentage of loan portfolio | 36.00% | 33.00%
Federal Home Loan Bank Advances | Asset Pledged as Collateral without Right |  |
Financing Receivable, Impaired [Line Items] |  |
Loans held for investment ("LHFI") (net of allowance for credit losses of $41,500 and $47,123) | $ 5,200,000 | $ 2,800,000
Federal Reserve Bank Advances | Asset Pledged as Collateral without Right |  |
Financing Receivable, Impaired [Line Items] |  |
Loans held for investment ("LHFI") (net of allowance for credit losses of $41,500 and $47,123) | $ 497,000 | $ 419,000

X
- Definition Allowance For Unfunded Commitments + References No definition available. + Details
Name: | hmst_AllowanceForUnfundedCommitments
Namespace Prefix: | hmst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financing Receivable, Interest Receivable + References No definition available. + Details
Name: | hmst_FinancingReceivableInterestReceivable
Namespace Prefix: | hmst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number Of Portfolio Segments + References No definition available. + Details
Name: | hmst_NumberOfPortfolioSegments
Namespace Prefix: | hmst_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of total loan portfolio. + References No definition available. + Details
Name: | hmst_PercentageOfLoanPortfolio
Namespace Prefix: | hmst_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableImpairedLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_MultifamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_FederalHomeLoanBankAdvancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgedStatusAxis=us-gaap_AssetPledgedAsCollateralWithoutRightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_FederalReserveBankAdvancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |