XML 78 R69.htm IDEA: XBRL DOCUMENT v3.23.2

MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details) - Single family	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques
Servicing asset, measurement input	16.70%	11.42%	13.78%	10.14%
Discount rate
Fair Value Measurement Inputs and Valuation Techniques
Servicing asset, measurement input	10.99%	9.83%	10.44%	8.90%

X

- Definition

Servicing Asset, Weighted Average Measurement Input

+ References

No definition available.

+ Details

Name:	hmst_ServicingAssetWeightedAverageMeasurementInput
Namespace Prefix:	hmst_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPrepaymentRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: