XML 77 R68.htm IDEA: XBRL DOCUMENT
v3.23.3

MORTGAGE BANKING OPERATIONS - Single Family MSR Roll Forward (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Additions and amortization: |  |  |  |
Amortization | $ 1,564 | $ 2,112 | $ 4,874 | $ 8,052
Changes in fair value of MSR assumptions | 785 | 1,989 | 1,794 | 16,615
Ending balance | 76,470 |  | 76,470 |
Single family |  |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |  |
Beginning balance | 76,314 | 76,481 | 76,617 | 61,584
Additions and amortization: |  |  |  |
Originations | 935 | 1,453 | 2,473 | 7,664
Purchases | 0 | 0 | 460 | 0
Amortization | (1,564) | (2,112) | (4,874) | (8,052)
Net additions and amortization | (629) | (659) | (1,941) | (388)
Changes in fair value of MSR assumptions | 785 | 1,989 | 1,794 | 16,615
Ending balance | $ 76,470 | $ 77,811 | $ 76,470 | $ 77,811

X
- Definition Additions And Amortization [Abstract] + References No definition available. + Details
Name: | hmst_AdditionsAndAmortizationAbstract
Namespace Prefix: | hmst_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Changes in the fair value of mortgage servicing rights due to modeled amortization. + References No definition available. + Details
Name: | hmst_ChangesInFairValueOfMortgageServicingRightsDueToModeledAmortization
Namespace Prefix: | hmst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Servicing Asset At Fair Value, Additions And Amortization, Net + References No definition available. + Details
Name: | hmst_ServicingAssetAtFairValueAdditionsAndAmortizationNet
Namespace Prefix: | hmst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Servicing Asset At Fair Value, Purchases + References No definition available. + Details
Name: | hmst_ServicingAssetAtFairValuePurchases
Namespace Prefix: | hmst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-3 + Details
Name: | us-gaap_ServicingAssetAtFairValueAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-2 + Details
Name: | us-gaap_ServicingAssetAtFairValueAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ServicingAssetAtFairValueAmountRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) from changes in fair value classified as other for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(4)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-3 + Details
Name: | us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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