Note 10 - Segment Financial Information: Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Division I
Segment Reporting Information, Revenue for Reportable Segment		$ 10,020	$ 9,129	$ 29,246		$ 28,769
Profit (Loss)		3,711	3,590	11,193		9,751
Segment Reporting Information, Net Assets		109,911		109,911
Segment Reporting Information, Net Assets				106,982
Division II
Segment Reporting Information, Revenue for Reportable Segment		10,174	8,823	29,304		26,793
Profit (Loss)		5,231	3,982	15,042		11,242
Segment Reporting Information, Net Assets		118,880		118,880
Segment Reporting Information, Net Assets				112,168
Division III
Segment Reporting Information, Revenue for Reportable Segment		10,592	9,713	31,083		29,418
Profit (Loss)		5,219	4,672	15,746		12,701
Segment Reporting Information, Net Assets		119,664		119,664
Segment Reporting Information, Net Assets				117,199
Division IV
Segment Reporting Information, Revenue for Reportable Segment		11,469	9,801	32,653		28,778
Profit (Loss)		5,573	4,454	15,381		10,297
Segment Reporting Information, Net Assets		146,148		146,148
Segment Reporting Information, Net Assets				136,558
Division V
Segment Reporting Information, Revenue for Reportable Segment		7,756	6,318	22,258		19,154
Profit (Loss)		3,234	2,404	9,244		6,141
Segment Reporting Information, Net Assets		87,448		87,448
Segment Reporting Information, Net Assets				77,143
Division VII
Segment Reporting Information, Revenue for Reportable Segment		7,223	6,297	20,941		18,588
Profit (Loss)		2,691	2,159	7,442		4,905
Segment Reporting Information, Net Assets		88,316		88,316
Segment Reporting Information, Net Assets				82,332
Division VIII
Segment Reporting Information, Revenue for Reportable Segment		6,450	5,130	18,400		16,045
Profit (Loss)		1,166	1,312	4,035		3,822
Segment Reporting Information, Net Assets		85,982		85,982
Segment Reporting Information, Net Assets				69,344
Division IX
Segment Reporting Information, Revenue for Reportable Segment		8,916	7,828	26,056		24,035
Profit (Loss)		3,429	2,911	10,991		8,087
Segment Reporting Information, Net Assets		106,149		106,149
Segment Reporting Information, Net Assets				103,048
Segment Reporting Information, Revenue for Reportable Segment		72,600	63,039	209,941		191,580
Profit (Loss)		30,254	25,484	89,074		$ 66,946
Segment Reporting Information, Net Assets		862,498		862,498
Segment Reporting Information, Net Assets				804,774
Reconciliation of Revenues
Total revenues from reportable divisions		72,600	63,039	209,941	$ 191,580
Corporate finance charges earned not allocated to divisions		22	23	67	75
Corporate investment income earned not allocated to divisions		1,811	1,690	5,549	5,139
Timing difference of insurance income allocation to divisions		2,613	2,715	7,557	6,545
Other revenue not allocated to divisions		4	2	10	7
Consolidated Revenues	[1]	77,050	67,469	223,124	203,346
Profit per division		30,254	25,485	89,074	66,946
Corporate earnings not allocated		4,450	4,429	13,183	11,765
Corporate expenses not allocated		(23,419)	(24,516)	(67,231)	(64,910)
Consolidated Income Before Income Taxes		$ 11,285	$ 5,398	$ 35,026	$ 13,801

[1] Includes Finance Charge Income, Investment Income, Insurance Premium Revenues and Other Revenue