XML 49 R39.htm IDEA: XBRL DOCUMENT v3.25.1

LOANS AND CREDIT QUALITY - Loans Credit Quality by Year and Type (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	$ 26,510	$ 163,704
Financing receivable, year two	143,391	238,834
Financing receivable, year three	227,880	2,275,837
Financing receivable, year four	2,217,942	1,102,301
Financing receivable, year five	1,091,125	591,778
Financing receivable, prior to year five	1,630,402	1,161,583
Revolving	720,745	692,476
Revolving-term	5,221	5,283
Total	6,063,216	6,231,796
Recurring
Financing Receivable, before Allowance for Credit Loss [Abstract]
Single family LHFI	1,248	1,287
Level 3 | Recurring
Financing Receivable, before Allowance for Credit Loss [Abstract]
Single family LHFI	1,248	1,287
30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	3,709	4,945
60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	2,204	1,727
90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total	4,182	4,354
Commercial loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	25,575	161,507
Financing receivable, year two	142,240	206,951
Financing receivable, year three	195,330	1,895,239
Financing receivable, year four	1,839,375	798,255
Financing receivable, year five	790,392	452,534
Financing receivable, prior to year five	1,249,881	904,196
Revolving	311,836	290,718
Revolving-term	843	766
Total	4,555,472	4,710,166
Commercial loans | Non-owner occupied CRE
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	3,986	0
Financing receivable, year two	0	1,441
Financing receivable, year three	1,426	70,128
Financing receivable, year four	69,279	71,493
Financing receivable, year five	71,021	39,885
Financing receivable, prior to year five	399,634	387,839
Revolving	(33)	(36)
Revolving-term	0	0
Total	545,313	570,750
Commercial loans | Non-owner occupied CRE | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	3,986	0
Financing receivable, year two	0	1,441
Financing receivable, year three	1,426	70,128
Financing receivable, year four	69,279	71,493
Financing receivable, year five	71,021	39,885
Financing receivable, prior to year five	360,281	347,058
Revolving	(33)	(36)
Revolving-term	0	0
Total	505,960	529,969
Commercial loans | Non-owner occupied CRE | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	23,264	24,551
Revolving	0	0
Revolving-term	0	0
Total	23,264	24,551
Commercial loans | Non-owner occupied CRE | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	16,089	16,230
Revolving	0	0
Revolving-term	0	0
Total	16,089	16,230
Commercial loans | Multifamily
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,353	1,650
Financing receivable, year two	0	106,415
Financing receivable, year three	106,376	1,620,674
Financing receivable, year four	1,614,712	647,833
Financing receivable, year five	647,610	330,418
Financing receivable, prior to year five	564,391	285,685
Revolving	0	0
Revolving-term	0	0
Total	2,934,442	2,992,675
Commercial loans | Multifamily | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	1,353	1,650
Financing receivable, year two	0	106,415
Financing receivable, year three	106,376	1,538,855
Financing receivable, year four	1,533,209	643,044
Financing receivable, year five	635,673	257,110
Financing receivable, prior to year five	468,289	255,643
Revolving	0	0
Revolving-term	0	0
Total	2,744,900	2,802,717
Commercial loans | Multifamily | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	66,217
Financing receivable, year four	61,593	4,789
Financing receivable, year five	11,049	73,308
Financing receivable, prior to year five	83,829	23,835
Revolving	0	0
Revolving-term	0	0
Total	156,471	168,149
Commercial loans | Multifamily | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	15,602
Financing receivable, year four	19,910	0
Financing receivable, year five	888	0
Financing receivable, prior to year five	12,273	6,207
Revolving	0	0
Revolving-term	0	0
Total	33,071	21,809
Commercial loans | Multifamily construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	31,349
Financing receivable, year three	34,462	67,557
Financing receivable, year four	30,739	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	65,201	98,906
Commercial loans | Multifamily construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	31,349
Financing receivable, year three	34,462	67,557
Financing receivable, year four	30,739	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	65,201	98,906
Commercial loans | Multifamily construction | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Multifamily construction | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | CRE construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	19
Financing receivable, year two	18	7,198
Financing receivable, year three	7,329	0
Financing receivable, year four	0	0
Financing receivable, year five	0	3,821
Financing receivable, prior to year five	3,796	0
Revolving	0	0
Revolving-term	0	0
Total	11,143	11,038
Commercial loans | CRE construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	19
Financing receivable, year two	18	7,198
Financing receivable, year three	7,329	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	7,347	7,217
Commercial loans | CRE construction | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | CRE construction | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	3,821
Financing receivable, prior to year five	3,796	0
Revolving	0	0
Revolving-term	0	0
Total	3,796	3,821
Commercial loans | Single family construction
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	19,488	121,305
Financing receivable, year two	105,716	22,412
Financing receivable, year three	16,807	5,346
Financing receivable, year four	3,167	7,252
Financing receivable, year five	3,185	0
Financing receivable, prior to year five	68	69
Revolving	180,963	164,442
Revolving-term	0	0
Total	329,394	320,826
Commercial loans | Single family construction | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	19,488	121,305
Financing receivable, year two	105,716	22,412
Financing receivable, year three	16,807	5,346
Financing receivable, year four	3,167	7,252
Financing receivable, year five	3,185	0
Financing receivable, prior to year five	68	69
Revolving	180,963	164,442
Revolving-term	0	0
Total	329,394	320,826
Commercial loans | Single family construction | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Single family construction | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Single family construction to permanent
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	493	6,153
Financing receivable, year two	5,830	9,719
Financing receivable, year three	4,231	17,598
Financing receivable, year four	13,198	7,977
Financing receivable, year five	6,520	523
Financing receivable, prior to year five	600	0
Revolving	0	0
Revolving-term	0	0
Total	30,872	41,970
Commercial loans | Single family construction to permanent | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	493	6,153
Financing receivable, year two	5,830	9,719
Financing receivable, year three	4,231	17,598
Financing receivable, year four	13,198	7,977
Financing receivable, year five	6,520	523
Financing receivable, prior to year five	600	0
Revolving	0	0
Revolving-term	0	0
Total	30,872	41,970
Commercial loans | Single family construction to permanent | 30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Single family construction to permanent | 60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Single family construction to permanent | 90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	0	0
Revolving-term	0	0
Total	0	0
Commercial loans | Owner occupied CRE
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	71	5,431
Financing receivable, year two	3,972	12,290
Financing receivable, year three	9,025	64,883
Financing receivable, year four	64,084	40,973
Financing receivable, year five	40,520	41,850
Financing receivable, prior to year five	222,421	196,524
Revolving	0	3
Revolving-term	13	43
Total	340,106	361,997
Commercial loans | Owner occupied CRE | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	71	5,431
Financing receivable, year two	3,972	10,501
Financing receivable, year three	9,025	58,423
Financing receivable, year four	57,667	33,371
Financing receivable, year five	36,046	41,533
Financing receivable, prior to year five	190,595	168,082
Revolving	0	3
Revolving-term	13	43
Total	297,389	317,387
Commercial loans | Owner occupied CRE | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	1,789
Financing receivable, year three	0	6,129
Financing receivable, year four	6,090	7,602
Financing receivable, year five	4,474	317
Financing receivable, prior to year five	30,543	26,203
Revolving	0	0
Revolving-term	0	0
Total	41,107	42,040
Commercial loans | Owner occupied CRE | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	331
Financing receivable, year four	327	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	1,283	2,239
Revolving	0	0
Revolving-term	0	0
Total	1,610	2,570
Commercial loans | Commercial business
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	184	26,949
Financing receivable, year two	26,704	16,127
Financing receivable, year three	15,674	49,053
Financing receivable, year four	44,196	22,727
Financing receivable, year five	21,536	36,037
Financing receivable, prior to year five	58,971	34,079
Revolving	130,906	126,309
Revolving-term	830	723
Total	299,001	312,004
Commercial loans | Commercial business | Pass
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	184	26,706
Financing receivable, year two	26,473	15,721
Financing receivable, year three	15,290	36,209
Financing receivable, year four	19,531	20,347
Financing receivable, year five	19,478	28,207
Financing receivable, prior to year five	46,220	28,836
Revolving	126,636	123,003
Revolving-term	818	700
Total	254,630	279,729
Commercial loans | Commercial business | Special Mention
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	959
Financing receivable, year four	13,075	2,380
Financing receivable, year five	2,058	638
Financing receivable, prior to year five	1,036	615
Revolving	1,172	386
Revolving-term	0	0
Total	17,341	4,978
Commercial loans | Commercial business | Substandard
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	243
Financing receivable, year two	231	406
Financing receivable, year three	384	11,885
Financing receivable, year four	11,590	0
Financing receivable, year five	0	7,192
Financing receivable, prior to year five	11,715	4,628
Revolving	3,098	2,920
Revolving-term	12	23
Total	27,030	27,297
Consumer loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		2,197
Financing receivable, year one, net	935
Financing receivable, year two	1,151	31,883
Financing receivable, year three	32,550	380,598
Financing receivable, year four	378,567	304,046
Financing receivable, year five	300,733	139,244
Financing receivable, prior to year five	380,521	257,387
Revolving	408,909	401,758
Revolving-term	4,378	4,517
Total	1,507,744	1,521,630
Consumer loans | Single family
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		566
Financing receivable, year one, net	0
Financing receivable, year two	0	30,940
Financing receivable, year three	31,711	379,065
Financing receivable, year four	377,273	303,920
Financing receivable, year five	300,628	139,159
Financing receivable, prior to year five	378,652	255,445
Revolving	0	0
Revolving-term	0	0
Total	1,088,264	1,109,095
Consumer loans | Single family | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		566
Financing receivable, year one, net	0
Financing receivable, year two	0	30,940
Financing receivable, year three	31,711	378,613
Financing receivable, year four	376,821	303,920
Financing receivable, year five	300,525	139,159
Financing receivable, prior to year five	374,970	251,322
Revolving	0	0
Revolving-term	0	0
Total	1,084,027	1,104,520
Consumer loans | Single family | 30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		0
Financing receivable, year one, net	0
Financing receivable, year two	0	0
Financing receivable, year three	0	452
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	1,285	1,673
Revolving	0	0
Revolving-term	0	0
Total	1,285	2,125
Consumer loans | Single family | 60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		0
Financing receivable, year one, net	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	103	0
Financing receivable, prior to year five	796	440
Revolving	0	0
Revolving-term	0	0
Total	899	440
Consumer loans | Single family | 90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one		0
Financing receivable, year one, net	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	452	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	1,601	2,010
Revolving	0	0
Revolving-term	0	0
Total	2,053	2,010
Consumer loans | Home equity and other
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	935	1,631
Financing receivable, year two	1,151	943
Financing receivable, year three	839	1,533
Financing receivable, year four	1,294	126
Financing receivable, year five	105	85
Financing receivable, prior to year five	1,869	1,942
Revolving	408,909	401,758
Revolving-term	4,378	4,517
Total	419,480	412,535
Consumer loans | Home equity and other | Current
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	935	1,606
Financing receivable, year two	1,141	936
Financing receivable, year three	835	1,528
Financing receivable, year four	1,290	126
Financing receivable, year five	105	85
Financing receivable, prior to year five	1,867	1,932
Revolving	406,020	399,531
Revolving-term	4,368	4,449
Total	416,561	410,193
Consumer loans | Home equity and other | 30-59 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	25
Financing receivable, year two	7	4
Financing receivable, year three	0	1
Financing receivable, year four	4	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	976	474
Revolving-term	4	62
Total	991	566
Consumer loans | Home equity and other | 60-89 days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	3	3
Financing receivable, year three	4	4
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	0	0
Revolving	480	626
Revolving-term	0	0
Total	487	633
Consumer loans | Home equity and other | 90+ days
Financing Receivable, before Allowance for Credit Loss [Abstract]
Financing receivable, year one	0	0
Financing receivable, year two	0	0
Financing receivable, year three	0	0
Financing receivable, year four	0	0
Financing receivable, year five	0	0
Financing receivable, prior to year five	2	10
Revolving	1,433	1,127
Revolving-term	6	6
Total	$ 1,441	$ 1,143

X

- Definition

Financing Receivable, Excluding Accrued Interest, Revolving, Net

+ References

No definition available.

+ Details

Name:	hmst_FinancingReceivableExcludingAccruedInterestRevolvingNet
Namespace Prefix:	hmst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Financing Receivable, Excluding Accrued Interest, Revolving, Term

+ References

No definition available.

+ Details

Name:	hmst_FinancingReceivableExcludingAccruedInterestRevolvingTerm
Namespace Prefix:	hmst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Net

+ References

No definition available.

+ Details

Name:	hmst_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearNet
Namespace Prefix:	hmst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestRevolving
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

+ Details

Name:	us-gaap_LoansReceivableFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables1To29DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hmst_HomeEquityLineOfCreditAdjustedForCreditAnalysisMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: