LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Risk-Rate and Non-Risk Rated Loans by Grade and Other Characteristic) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 11,354,656	$ 10,810,455
Financing Receivable, Allowance for Credit Loss, Writeoff	8,366	5,707	$ 2,713
Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	191,347	170,577
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	171,338	163,939
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	142,490	161,864
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	155,122	144,665
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	116,939	84,423
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	191,494	154,219
Financing Receivable, Revolving	58,696	36,210
Financing Receivable, before Allowance for Credit Loss	1,027,426	915,897
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	351
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	351
Commer[Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	128,132	154,128
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	144,473	168,286
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	214,831	281,324
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	270,202	123,315
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	142,808	156,174
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	669,274	608,983
Financing Receivable, Revolving	53,952	49,134
Financing Receivable, before Allowance for Credit Loss	1,623,672	1,541,344
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Multifamily Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	124,675	96,865
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	87,955	177,907
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	206,373	215,220
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	205,964	101,336
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	94,637	46,886
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	172,360	169,733
Financing Receivable, Revolving	2,461	3,285
Financing Receivable, before Allowance for Credit Loss	894,425	811,232
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0
Commercial Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	75,095	89,175
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	34,032	62,302
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	12,481	4,814
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	754	12,705
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	1,015
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	122,362	170,011
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Multifamily construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	151,244	176,729
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	226,411	256,661
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	121,706	70,189
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	414
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	14,345	0
Financing Receivable, before Allowance for Credit Loss	513,706	503,993
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0
One-to four-family construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	451,895	454,533
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	51,259	43,816
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	10,744	27,373
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	329
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	322	381
Financing Receivable, before Allowance for Credit Loss	514,220	526,432
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	150
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	150
Land and Land Improvements [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	201,254	188,134
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	86,442	81,324
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	33,679	34,146
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	23,174	12,338
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	10,137	8,409
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	13,871	10,152
Financing Receivable, Revolving	1,106	2,136
Financing Receivable, before Allowance for Credit Loss	369,663	336,639
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Commercial business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	171,924	159,948
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	131,190	228,789
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	187,205	124,429
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	99,355	139,273
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	112,095	104,097
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	195,417	128,185
Financing Receivable, Revolving	421,147	371,013
Financing Receivable, before Allowance for Credit Loss	1,318,333	1,255,734
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	2,301
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	418
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	689
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	54
Financing Receivable, Revolving, Writeoff	558
Financing Receivable, Allowance for Credit Loss, Writeoff	4,020	2,650	1,699
Agricultural Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	24,292	53,227
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	49,208	35,520
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	30,144	25,937
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	23,300	17,658
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	16,113	31,704
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	62,734	40,854
Financing Receivable, Revolving	134,489	126,189
Financing Receivable, before Allowance for Credit Loss	340,280	331,089
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	0	564	$ 42
Pass (Risk Ratings 1-5) [Member] \| Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	188,895	170,577
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	171,046	149,489
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	120,470	161,647
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	152,940	139,934
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	107,495	65,424
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	174,221	154,036
Financing Receivable, Revolving	56,699	36,209
Financing Receivable, before Allowance for Credit Loss	971,766	877,316
Pass (Risk Ratings 1-5) [Member] \| Commer[Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	128,132	154,128
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	144,473	168,286
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	209,107	281,324
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	270,202	123,315
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	142,808	156,174
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	659,253	597,977
Financing Receivable, Revolving	51,925	47,936
Financing Receivable, before Allowance for Credit Loss	1,605,900	1,529,140
Pass (Risk Ratings 1-5) [Member] \| Multifamily Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	124,675	96,865
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	87,955	177,907
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	206,373	215,220
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	205,964	101,336
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	94,637	46,886
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	170,235	167,305
Financing Receivable, Revolving	2,461	3,285
Financing Receivable, before Allowance for Credit Loss	892,300	808,804
Pass (Risk Ratings 1-5) [Member] \| Commercial Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	75,095	86,165
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	34,032	62,302
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	12,481	4,056
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	12,705
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	1,015
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	121,608	166,243
Pass (Risk Ratings 1-5) [Member] \| Multifamily construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	151,244	176,729
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	226,411	256,661
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	121,706	70,189
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	414
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	14,345	0
Financing Receivable, before Allowance for Credit Loss	513,706	503,993
Pass (Risk Ratings 1-5) [Member] \| One-to four-family construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	445,602	447,818
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	50,521	43,563
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	10,744	25,229
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	329
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	322	381
Financing Receivable, before Allowance for Credit Loss	507,189	517,320
Pass (Risk Ratings 1-5) [Member] \| Land and Land Improvements [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	197,490	188,134
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	85,344	80,472
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	33,283	34,146
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	22,897	12,338
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,575	8,409
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	13,871	10,152
Financing Receivable, Revolving	1,106	2,136
Financing Receivable, before Allowance for Credit Loss	363,566	335,787
Pass (Risk Ratings 1-5) [Member] \| Commercial business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	168,794	157,830
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	129,476	223,582
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	186,001	121,031
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	97,590	134,066
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	108,881	102,545
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	192,416	126,175
Financing Receivable, Revolving	365,770	363,652
Financing Receivable, before Allowance for Credit Loss	1,248,928	1,228,881
Pass (Risk Ratings 1-5) [Member] \| Agricultural Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	22,330	48,620
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	40,228	35,520
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	19,475	24,659
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	22,117	17,658
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	12,746	23,885
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	53,884	38,273
Financing Receivable, Revolving	127,755	123,158
Financing Receivable, before Allowance for Credit Loss	298,535	311,773
Special Mention [Member] \| Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,452	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,444	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	1,997	1
Financing Receivable, before Allowance for Credit Loss	13,893	1
Special Mention [Member] \| Commer[Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,649	2,714
Financing Receivable, Revolving	2,027	1,198
Financing Receivable, before Allowance for Credit Loss	4,676	3,912
Special Mention [Member] \| Multifamily Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Special Mention [Member] \| Commercial Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	3,010
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	3,010
Special Mention [Member] \| Multifamily construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Special Mention [Member] \| One-to four-family construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Special Mention [Member] \| Land and Land Improvements [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	852
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	852
Special Mention [Member] \| Commercial business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	241	199
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	657	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	818	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	43
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	727	0
Financing Receivable, Revolving	12,022	2,548
Financing Receivable, before Allowance for Credit Loss	14,465	2,790
Special Mention [Member] \| Agricultural Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	550
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	670	652
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	301
Financing Receivable, Revolving	6,684	308
Financing Receivable, before Allowance for Credit Loss	7,354	1,811
Substandard [Member] \| Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	292	14,450
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	22,020	217
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,182	4,731
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	18,999
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	17,273	183
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	41,767	38,580
Substandard [Member] \| Commer[Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,724	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	7,372	8,292
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	13,096	8,292
Substandard [Member] \| Multifamily Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,125	2,428
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	2,125	2,428
Substandard [Member] \| Commercial Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	758
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	754	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	754	758
Substandard [Member] \| Multifamily construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Substandard [Member] \| One-to four-family construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	6,293	6,715
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	738	253
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	2,144
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	7,031	9,112
Substandard [Member] \| Land and Land Improvements [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	3,764	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,098	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	396	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	277	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	562	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	6,097	0
Substandard [Member] \| Commercial business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,889	1,919
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,714	5,207
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	547	3,398
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	947	5,207
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,214	1,509
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,274	2,010
Financing Receivable, Revolving	43,355	4,813
Financing Receivable, before Allowance for Credit Loss	54,940	24,063
Substandard [Member] \| Agricultural Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,962	4,057
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	8,980	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	9,999	626
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,183	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,367	7,819
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	8,850	2,280
Financing Receivable, Revolving	50	2,723
Financing Receivable, before Allowance for Credit Loss	34,391	17,505
Doubtful [Member] \| Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Doubtful [Member] \| Commer[Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Doubtful [Member] \| Multifamily Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Doubtful [Member] \| Commercial Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Doubtful [Member] \| Multifamily construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Doubtful [Member] \| One-to four-family construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Doubtful [Member] \| Land and Land Improvements [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0

LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Risk-Rate and Non-Risk Rated Loans by Grade and Other Characteristic) (Details) - USD ($)
$ in Thousands