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, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	$ 5,707	$ 2,713	$ 6,683
Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	170,577	180,906
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	163,939	198,787
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	161,864	157,483
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	144,665	90,564
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	84,423	57,095
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	154,219	149,251
Financing Receivable, Revolving	36,210	11,234
Financing Receivable, before Allowance for Credit Loss	915,897	845,320
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
Commer[Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	154,128	190,627
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	168,286	323,160
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	281,324	142,476
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	123,315	186,136
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	156,174	169,667
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	608,983	550,906
Financing Receivable, Revolving	49,134	27,003
Financing Receivable, before Allowance for Credit Loss	1,541,344	1,589,975
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	96,865	139,383
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	177,907	177,784
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	215,220	93,961
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	101,336	46,460
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	46,886	29,665
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	169,733	156,140
Financing Receivable, Revolving	3,285	1,678
Financing Receivable, before Allowance for Credit Loss	811,232	645,071
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	59
Commercial Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	89,175	115,160
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	62,302	46,680
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4,814	12,952
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,705	4,260
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	5,824
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,015	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	170,011	184,876
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	176,729	142,680
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	256,661	161,066
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	70,189	20,622
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	414	1,448
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	503,993	325,816
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	454,533	586,174
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	43,816	59,436
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	27,373	677
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	331
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	329	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	381	711
Financing Receivable, before Allowance for Credit Loss	526,432	647,329
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	136
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	933
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	1,069
Land and Land Improvements [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	188,134	199,339
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	81,324	88,066
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	34,146	16,278
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,338	11,866
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	8,409	6,339
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,152	6,248
Financing Receivable, Revolving	2,136	339
Financing Receivable, before Allowance for Credit Loss	336,639	328,475
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	20
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Allowance for Credit Loss, Writeoff	20
Commercial business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	159,948	250,147
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	228,789	161,765
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	124,429	166,917
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	139,273	127,577
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	104,097	92,666
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	128,185	86,182
Financing Receivable, Revolving	371,013	398,153
Financing Receivable, before Allowance for Credit Loss	1,255,734	1,283,407
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	22
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	108
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	681
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	5
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	27
Financing Receivable, Revolving, Writeoff	318
Financing Receivable, Allowance for Credit Loss, Writeoff	1,161	1,699	1,762
Agricultural Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	53,227	38,863
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	35,520	36,746
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	25,937	19,217
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	17,658	34,919
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	31,704	24,710
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	40,854	29,662
Financing Receivable, Revolving	126,189	110,960
Financing Receivable, before Allowance for Credit Loss	331,089	295,077
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	430
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	134
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	564	42	$ 181
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	170,577	167,150
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	149,489	198,787
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	161,647	150,272
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	139,934	74,171
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	65,424	57,095
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	154,036	148,902
Financing Receivable, Revolving	36,209	10,833
Financing Receivable, before Allowance for Credit Loss	877,316	807,210
Pass (Risk Ratings 1-5) [Member] \| Commer[Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	154,128	190,627
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	168,286	323,160
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	281,324	142,476
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	123,315	182,853
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	156,174	169,667
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	597,977	547,899
Financing Receivable, Revolving	47,936	25,691
Financing Receivable, before Allowance for Credit Loss	1,529,140	1,582,373
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	96,865	139,383
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	177,907	177,784
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	215,220	93,961
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	101,336	46,460
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	46,886	29,665
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	167,305	156,140
Financing Receivable, Revolving	3,285	1,678
Financing Receivable, before Allowance for Credit Loss	808,804	645,071
Pass (Risk Ratings 1-5) [Member] \| Commercial Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	86,165	112,229
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	62,302	46,679
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4,056	12,952
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,705	4,260
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	1,107
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,015	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	166,243	177,227
Pass (Risk Ratings 1-5) [Member] \| Multifamily construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	176,729	142,680
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	256,661	161,066
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	70,189	20,622
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	414	1,448
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	503,993	325,816
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	447,818	572,701
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	43,563	56,530
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	25,229	677
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	331
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	329	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	381	711
Financing Receivable, before Allowance for Credit Loss	517,320	630,950
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	188,134	199,339
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	80,472	88,066
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	34,146	16,278
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,338	11,866
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	8,409	6,242
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,152	6,164
Financing Receivable, Revolving	2,136	339
Financing Receivable, before Allowance for Credit Loss	335,787	328,294
Pass (Risk Ratings 1-5) [Member] \| Commercial business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	157,830	249,609
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	223,582	149,140
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	121,031	161,494
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	134,066	126,416
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	102,545	86,712
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	126,175	85,386
Financing Receivable, Revolving	363,652	391,852
Financing Receivable, before Allowance for Credit Loss	1,228,881	1,250,609
Pass (Risk Ratings 1-5) [Member] \| Agricultural Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	48,620	36,848
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	35,520	35,440
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	24,659	18,946
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	17,658	28,354
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	23,885	24,710
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	38,273	27,063
Financing Receivable, Revolving	123,158	109,606
Financing Receivable, before Allowance for Credit Loss	311,773	280,967
Special Mention [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	2,829
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	42
Financing Receivable, Revolving	1	201
Financing Receivable, before Allowance for Credit Loss	1	3,072
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	2,714	0
Financing Receivable, Revolving	1,198	0
Financing Receivable, before Allowance for Credit Loss	3,912	0
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	3,010	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	3,010	0
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	852	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	852	0
Special Mention [Member] \| Commercial business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	199	74
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	26
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	3,467
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	43	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	2,548	200
Financing Receivable, before Allowance for Credit Loss	2,790	3,767
Special Mention [Member] \| Agricultural Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	550	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	336
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	652	271
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	301	0
Financing Receivable, Revolving	308	357
Financing Receivable, before Allowance for Credit Loss	1,811	964
Substandard [Member] \| Owner-occupied Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	13,756
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	14,450	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	217	7,211
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,731	13,564
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	18,999	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	183	307
Financing Receivable, Revolving	0	200
Financing Receivable, before Allowance for Credit Loss	38,580	35,038
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	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	3,283
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	8,292	3,007
Financing Receivable, Revolving	0	1,312
Financing Receivable, before Allowance for Credit Loss	8,292	7,602
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	2,428	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	2,428	0
Substandard [Member] \| Commercial Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	2,931
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	1
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	758	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	4,717
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	758	7,649
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	6,715	13,473
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	253	2,906
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,144	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	9,112	16,379
Substandard [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
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	97
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	84
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss	0	181
Substandard [Member] \| Commercial business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,919	464
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,207	12,599
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3,398	1,956
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,207	1,161
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,509	5,954
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,010	796
Financing Receivable, Revolving	4,813	6,101
Financing Receivable, before Allowance for Credit Loss	24,063	29,031
Substandard [Member] \| Agricultural Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,057	2,015
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	970
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	626	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	6,565
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	7,819	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,280	2,599
Financing Receivable, Revolving	2,723	997
Financing Receivable, before Allowance for Credit Loss	17,505	13,146
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
Financing Receivable, Year Three, Originated, Two Years 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