XML 50 R40.htm IDEA: XBRL DOCUMENT v3.25.1

Loans Receivable - Loans Based on Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Sep. 30, 2024
Gross Charge-offs
Total Loans	$ 5,443	$ 345	$ 6,228	$ 638
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	369,710		369,710		$ 492,643
2024	543,306		543,306		1,062,522
2023	1,078,101		1,078,101		3,617,204
2022	3,563,244		3,563,244		2,540,773
2021	2,466,221		2,466,221		1,201,276
Prior to 2021	2,819,323		2,819,323		1,857,904
Revolving Loans	1,397,249		1,397,249		1,374,384
Revolving to Term Loans	1,805		1,805		58,714
Total Loans	12,238,959		12,238,959		12,205,420
Gross Charge-offs
YTD 2025			202		175
2024			0		42
2023			178		10
2022			0		15
2021			928		0
Prior to 2021			3,791		359
Revolving Loans			0		2,331
Revolving to Term Loans			49		31
Total Loans	4,628	65	5,148	145	2,963
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	331,486		331,486		490,419
2024	535,227		535,227		1,034,082
2023	1,042,873		1,042,873		3,551,477
2022	3,440,448		3,440,448		2,488,588
2021	2,373,162		2,373,162		1,144,343
Prior to 2021	2,601,340		2,601,340		1,688,884
Revolving Loans	1,238,073		1,238,073		1,267,493
Revolving to Term Loans	1,306		1,306		58,710
Total Loans	11,563,915		11,563,915		11,723,996
Commercial loans | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	5,770		5,770		0
2024	448		448		0
2023	0		0		1,698
2022	55,242		55,242		28,092
2021	19,281		19,281		11,254
Prior to 2021	47,513		47,513		14,851
Revolving Loans	37,359		37,359		21,264
Revolving to Term Loans	0		0		0
Total Loans	165,613		165,613		77,159
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	32,454		32,454		2,224
2024	7,631		7,631		28,440
2023	35,228		35,228		64,029
2022	67,554		67,554		24,093
2021	73,778		73,778		45,679
Prior to 2021	165,148		165,148		154,169
Revolving Loans	121,817		121,817		85,627
Revolving to Term Loans	499		499		4
Total Loans	504,109		504,109		404,265
Commercial loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0
2024	0		0
2023	0		0
2022	0		0
2021	0		0
Prior to 2021	5,322		5,322
Revolving Loans	0		0
Revolving to Term Loans	0		0
Total Loans	5,322		5,322
Commercial loans | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	16,598		16,598		62,038
2024	91,722		91,722		198,790
2023	348,243		348,243		1,660,724
2022	1,728,561		1,728,561		1,211,510
2021	1,303,402		1,303,402		586,668
Prior to 2021	1,346,185		1,346,185		763,090
Revolving Loans	32,629		32,629		56,627
Revolving to Term Loans	0		0		16,753
Total Loans	4,867,340		4,867,340		4,556,200
Gross Charge-offs
Total Loans	0	0	0	0
Commercial loans | Multi-family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	16,598		16,598		62,038
2024	91,722		91,722		198,790
2023	348,243		348,243		1,645,460
2022	1,658,880		1,658,880		1,203,005
2021	1,278,564		1,278,564		577,037
Prior to 2021	1,250,956		1,250,956		716,573
Revolving Loans	32,629		32,629		56,627
Revolving to Term Loans	0		0		16,753
Total Loans	4,677,592		4,677,592		4,476,283
Commercial loans | Multi-family | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		1,698
2022	51,048		51,048		2,655
2021	16,775		16,775		2,572
Prior to 2021	42,679		42,679		5,452
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	110,502		110,502		12,377
Commercial loans | Multi-family | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		13,566
2022	18,633		18,633		5,850
2021	8,063		8,063		7,059
Prior to 2021	50,107		50,107		41,065
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	76,803		76,803		67,540
Commercial loans | Multi-family | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0
2024	0		0
2023	0		0
2022	0		0
2021	0		0
Prior to 2021	2,443		2,443
Revolving Loans	0		0
Revolving to Term Loans	0		0
Total Loans	2,443		2,443
Commercial loans | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	124,989		124,989		216,520
2024	236,925		236,925		252,923
2023	237,954		237,954		1,094,886
2022	1,114,097		1,114,097		748,076
2021	716,743		716,743		509,314
Prior to 2021	1,172,743		1,172,743		875,187
Revolving Loans	34,789		34,789		35,249
Revolving to Term Loans	1,237		1,237		0
Total Loans	3,639,477		3,639,477		3,732,155
Gross Charge-offs
YTD 2025			0		0
2024			0		0
2023			163		0
2022			0		0
2021			928		0
Prior to 2021			3,464		203
Revolving Loans			0		0
Revolving to Term Loans					0
Total Loans	4,392	0	4,555	0	203
Commercial loans | Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	124,989		124,989		216,520
2024	236,925		236,925		252,923
2023	237,954		237,954		1,086,200
2022	1,109,391		1,109,391		723,600
2021	668,342		668,342		475,313
Prior to 2021	1,093,962		1,093,962		797,877
Revolving Loans	34,789		34,789		35,249
Revolving to Term Loans	1,237		1,237		0
Total Loans	3,507,589		3,507,589		3,587,682
Commercial loans | Commercial real estate | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		22,216
2021	1,734		1,734		8,682
Prior to 2021	4,744		4,744		9,399
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	6,478		6,478		40,297
Commercial loans | Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		8,686
2022	4,706		4,706		2,260
2021	46,667		46,667		25,319
Prior to 2021	71,158		71,158		67,911
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	122,531		122,531		104,176
Commercial loans | Commercial real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0
2024	0		0
2023	0		0
2022	0		0
2021	0		0
Prior to 2021	2,879		2,879
Revolving Loans	0		0
Revolving to Term Loans	0		0
Total Loans	2,879		2,879
Commercial loans | Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	171,158		171,158		44,374
2024	44,225		44,225		167,877
2023	162,827		162,827		266,932
2022	213,936		213,936		284,432
2021	270,215		270,215		102,446
Prior to 2021	287,496		287,496		201,536
Revolving Loans	1,234,320		1,234,320		1,223,174
Revolving to Term Loans	568		568		41,961
Total Loans	2,384,745		2,384,745		2,332,732
Gross Charge-offs
YTD 2025			202		175
2024			0		42
2023			15		10
2022			0		15
2021			0		0
Prior to 2021			327		7
Revolving Loans			0		2,331
Revolving to Term Loans			49		31
Total Loans	236	65	593	127	2,611
Commercial loans | Commercial & industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	134,781		134,781		42,232
2024	41,162		41,162		148,059
2023	141,293		141,293		231,215
2022	193,282		193,282		282,148
2021	267,640		267,640		89,219
Prior to 2021	243,814		243,814		156,666
Revolving Loans	1,075,144		1,075,144		1,116,283
Revolving to Term Loans	69		69		41,957
Total Loans	2,097,185		2,097,185		2,107,779
Commercial loans | Commercial & industrial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	5,770		5,770		0
2024	448		448		0
2023	0		0		0
2022	0		0		0
2021	772		772		0
Prior to 2021	90		90		0
Revolving Loans	37,359		37,359		21,264
Revolving to Term Loans	0		0		0
Total Loans	44,439		44,439		21,264
Commercial loans | Commercial & industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	30,607		30,607		2,142
2024	2,615		2,615		19,818
2023	21,534		21,534		35,717
2022	20,654		20,654		2,284
2021	1,803		1,803		13,227
Prior to 2021	43,592		43,592		44,870
Revolving Loans	121,817		121,817		85,627
Revolving to Term Loans	499		499		4
Total Loans	243,121		243,121		203,689
Commercial loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	43,033		43,033		146,236
2024	149,037		149,037		429,956
2023	319,107		319,107		538,370
2022	465,050		465,050		250,120
2021	139,598		139,598		0
Prior to 2021	0		0		0
Revolving Loans	95,511		95,511		59,334
Revolving to Term Loans	0		0		0
Total Loans	1,211,336		1,211,336		1,424,016
Gross Charge-offs
Total Loans	0	0	0	0
Commercial loans | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	41,186		41,186		146,154
2024	144,454		144,454		421,334
2023	305,458		305,458		532,310
2022	437,295		437,295		233,200
2021	122,353		122,353		0
Prior to 2021	0		0		0
Revolving Loans	95,511		95,511		59,334
Revolving to Term Loans	0		0		0
Total Loans	1,146,257		1,146,257		1,392,332
Commercial loans | Construction | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	4,194		4,194		3,221
2021	0		0		0
Prior to 2021	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	4,194		4,194		3,221
Commercial loans | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	1,847		1,847		82
2024	4,583		4,583		8,622
2023	13,649		13,649		6,060
2022	23,561		23,561		13,699
2021	17,245		17,245		0
Prior to 2021	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	60,885		60,885		28,463
Commercial loans | Land - acquisition & development
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	13,932		13,932		23,475
2024	21,397		21,397		12,976
2023	9,970		9,970		56,292
2022	41,600		41,600		46,635
2021	36,263		36,263		2,848
Prior to 2021	12,899		12,899		18,091
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	136,061		136,061		160,317
Gross Charge-offs
YTD 2025					0
2024					0
2023					0
2022					0
2021					0
Prior to 2021					149
Revolving Loans					0
Revolving to Term Loans					0
Total Loans	0	0	0	18	149
Commercial loans | Land - acquisition & development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	13,932		13,932		23,475
2024	20,964		20,964		12,976
2023	9,925		9,925		56,292
2022	41,600		41,600		46,635
2021	36,263		36,263		2,774
Prior to 2021	12,608		12,608		17,768
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	135,292		135,292		159,920
Commercial loans | Land - acquisition & development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	433		433		0
2023	45		45		0
2022	0		0		0
2021	0		0		74
Prior to 2021	291		291		323
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	769		769		397
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	261,007		261,007		460,352
2024	438,415		438,415		893,513
2023	862,236		862,236		2,334,575
2022	2,257,253		2,257,253		2,097,678
2021	2,027,194		2,027,194		817,561
Prior to 2021	2,705,272		2,705,272		2,009,369
Revolving Loans	331,321		331,321		300,523
Revolving to Term Loans	1,053		1,053		1,116
Total Loans	8,883,751		8,883,751		8,914,687
Gross Charge-offs
YTD 2025			0		0
2024			5		0
2023			0		13
2022			0		0
2021			0		0
Prior to 2021			401		270
Revolving Loans			670		379
Revolving to Term Loans			4		0
Total Loans	815	280	1,080	493	662
Consumer loans | Current
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	261,007		261,007		460,352
2024	437,699		437,699		889,456
2023	860,526		860,526		2,329,898
2022	2,252,974		2,252,974		2,095,140
2021	2,023,230		2,023,230		814,809
Prior to 2021	2,679,863		2,679,863		1,992,035
Revolving Loans	328,570		328,570		298,047
Revolving to Term Loans	1,029		1,029		1,116
Total Loans	8,844,898		8,844,898		8,880,853
Consumer loans | 30 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	716		716		0
2023	897		897		375
2022	2,629		2,629		0
2021	660		660		1,063
Prior to 2021	7,744		7,744		2,797
Revolving Loans	1,694		1,694		1,390
Revolving to Term Loans	24		24		0
Total Loans	14,364		14,364		5,625
Consumer loans | 60 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		3,237
2023	0		0		0
2022	279		279		1,199
2021	2,008		2,008		662
Prior to 2021	1,997		1,997		2,834
Revolving Loans	730		730		329
Revolving to Term Loans	0		0		0
Total Loans	5,014		5,014		8,261
Consumer loans | 90+ days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		820
2023	813		813		4,302
2022	1,371		1,371		1,339
2021	1,296		1,296		1,027
Prior to 2021	15,668		15,668		11,703
Revolving Loans	327		327		757
Revolving to Term Loans	0		0		0
Total Loans	19,475		19,475		19,948
Consumer loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	11,717		11,717		54,649
2024	71,846		71,846		108,941
2023	46,829		46,829		17,930
2022	6,750		6,750		537
2021	0		0		0
Prior to 2021	359		359		358
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	137,501		137,501		182,415
Gross Charge-offs
Total Loans	0	0	0	0
Consumer loans | Construction | Current
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	11,717		11,717		54,649
2024	71,846		71,846		108,941
2023	46,829		46,829		17,082
2022	5,902		5,902		537
2021	0		0		0
Prior to 2021	359		359		358
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	136,653		136,653		181,567
Consumer loans | Construction | 90+ days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		848
2022	848		848		0
2021	0		0		0
Prior to 2021	0		0		0
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	848		848		848
Consumer loans | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	233,030		233,030		384,516
2024	349,187		349,187		769,730
2023	803,374		803,374		2,289,825
2022	2,228,568		2,228,568		2,063,897
2021	1,995,430		1,995,430		800,338
Prior to 2021	2,654,729		2,654,729		1,971,994
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	8,264,318		8,264,318		8,280,300
Gross Charge-offs
YTD 2025			0		0
2024			0		0
2023			0		13
2022			0		0
2021			0		0
Prior to 2021			338		131
Revolving Loans			0		0
Revolving to Term Loans			0		0
Total Loans	338	131	338	131	144
Consumer loans | Single-family residential | Current
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	233,030		233,030		384,516
2024	348,471		348,471		765,673
2023	801,664		801,664		2,285,996
2022	2,225,305		2,225,305		2,061,359
2021	1,991,466		1,991,466		797,586
Prior to 2021	2,630,070		2,630,070		1,955,459
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	8,230,006		8,230,006		8,250,589
Consumer loans | Single-family residential | 30 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	716		716		0
2023	897		897		375
2022	2,461		2,461		0
2021	660		660		1,063
Prior to 2021	7,365		7,365		2,489
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	12,099		12,099		3,927
Consumer loans | Single-family residential | 60 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		3,237
2023	0		0		0
2022	279		279		1,199
2021	2,008		2,008		662
Prior to 2021	1,760		1,760		2,442
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	4,047		4,047		7,540
Consumer loans | Single-family residential | 90+ days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		820
2023	813		813		3,454
2022	523		523		1,339
2021	1,296		1,296		1,027
Prior to 2021	15,534		15,534		11,604
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	18,166		18,166		18,244
Consumer loans | Land - consumer lot loans
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	7,261		7,261		19,672
2024	17,103		17,103		14,809
2023	12,015		12,015		26,839
2022	21,944		21,944		23,804
2021	22,553		22,553		9,223
Prior to 2021	20,908		20,908		13,713
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	101,784		101,784		108,060
Gross Charge-offs
Total Loans	0	0	0	0
Consumer loans | Land - consumer lot loans | Current
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	7,261		7,261		19,672
2024	17,103		17,103		14,809
2023	12,015		12,015		26,839
2022	21,776		21,776		23,804
2021	22,553		22,553		9,223
Prior to 2021	20,901		20,901		13,713
Revolving Loans	0		0		0
Revolving to Term Loans	0		0		0
Total Loans	101,609		101,609		108,060
Consumer loans | Land - consumer lot loans | 30 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0
2024	0		0
2023	0		0
2022	168		168
2021	0		0
Prior to 2021	0		0
Revolving Loans	0		0
Revolving to Term Loans	0		0
Total Loans	168		168
Consumer loans | Land - consumer lot loans | 90+ days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0
2024	0		0
2023	0		0
2022	0		0
2021	0		0
Prior to 2021	7		7
Revolving Loans	0		0
Revolving to Term Loans	0		0
Total Loans	7		7
Consumer loans | HELOC
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		0
2021	0		0		0
Prior to 2021	5,120		5,120		4,792
Revolving Loans	282,055		282,055		263,949
Revolving to Term Loans	1,053		1,053		1,116
Total Loans	288,228		288,228		269,857
Gross Charge-offs
Total Loans	0	0	0	0
Consumer loans | HELOC | Current
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		0
2021	0		0		0
Prior to 2021	4,670		4,670		4,176
Revolving Loans	279,694		279,694		262,055
Revolving to Term Loans	1,029		1,029		1,116
Total Loans	285,393		285,393		267,347
Consumer loans | HELOC | 30 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		0
2021	0		0		0
Prior to 2021	204		204		216
Revolving Loans	1,592		1,592		1,171
Revolving to Term Loans	24		24		0
Total Loans	1,820		1,820		1,387
Consumer loans | HELOC | 60 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		0
2021	0		0		0
Prior to 2021	164		164		392
Revolving Loans	597		597		185
Revolving to Term Loans	0		0		0
Total Loans	761		761		577
Consumer loans | HELOC | 90+ days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		0
2021	0		0		0
Prior to 2021	82		82		8
Revolving Loans	172		172		538
Revolving to Term Loans	0		0		0
Total Loans	254		254		546
Consumer loans | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	8,999		8,999		1,515
2024	279		279		33
2023	18		18
2022					9,440
2021	9,211		9,211		8,000
Prior to 2021	24,156		24,156		18,512
Revolving Loans	49,266		49,266		36,574
Revolving to Term Loans	0		0		0
Total Loans	91,920		91,920		74,055
Gross Charge-offs
YTD 2025			0		0
2024			5		0
2023			0		0
2022			0		0
2021			0		0
Prior to 2021			63		139
Revolving Loans			670		379
Revolving to Term Loans			4		0
Total Loans	477	$ 149	742	$ 362	518
Consumer loans | Consumer | Netting adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
2023					(19)
2022	(9)		(9)
Consumer loans | Consumer | Current
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	8,999		8,999		1,515
2024	279		279		33
2023	18		18
2022					9,440
2021	9,211		9,211		8,000
Prior to 2021	23,863		23,863		18,329
Revolving Loans	48,876		48,876		35,992
Revolving to Term Loans	0		0		0
Total Loans	91,237		91,237		73,290
Consumer loans | Consumer | Current | Netting adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
2023					(19)
2022	(9)		(9)
Consumer loans | Consumer | 30 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		0
2021	0		0		0
Prior to 2021	175		175		92
Revolving Loans	102		102		219
Revolving to Term Loans	0		0		0
Total Loans	277		277		311
Consumer loans | Consumer | 60 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		0
2021	0		0		0
Prior to 2021	73		73		0
Revolving Loans	133		133		144
Revolving to Term Loans	0		0		0
Total Loans	206		206		144
Consumer loans | Consumer | 90+ days past due
Financing Receivable, Credit Quality Indicator [Line Items]
YTD 2025	0		0		0
2024	0		0		0
2023	0		0		0
2022	0		0		0
2021	0		0		0
Prior to 2021	45		45		91
Revolving Loans	155		155		219
Revolving to Term Loans	0		0		0
Total Loans	$ 200		$ 200		$ 310

X

- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: 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 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract
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 classified as current. 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossCurrent
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

Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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 revolving financing receivable converted to term loan.

+ 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 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6A

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

X

- Definition

Amount, excluding accrued interest, of writeoff of revolving financing receivable converted to term loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6A

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable that can be withdrawn, repaid, and redrawn.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Amount, excluding accrued interest, of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Amount, excluding accrued interest, of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

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

+ References

Reference 1: 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Amount, excluding accrued interest, of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Amount, excluding accrued interest, of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-29

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

Reference 3: 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

+ Details

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

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
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_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=wfsl_LandAcquisitionAndDevelopmentMember
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_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
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_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_SingleFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	wfsl_NettingAxis=wfsl_NettingAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: