Note 10 - Segment Financial Information: Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Division I
Segment Reporting Information, Revenue for Reportable Segment		$ 9,430	$ 9,130	$ 19,640		$ 17,911
Profit (Loss)		2,908	3,121	6,161		6,221
Segment Reporting Information, Net Assets		101,310		101,310
Segment Reporting Information, Net Assets				105,094
Division II
Segment Reporting Information, Revenue for Reportable Segment		8,789	8,620	17,970		17,129
Profit (Loss)		3,506	3,452	7,260		7,013
Segment Reporting Information, Net Assets		102,672		102,672
Segment Reporting Information, Net Assets				102,952
Division III
Segment Reporting Information, Revenue for Reportable Segment		9,542	9,504	19,705		18,816
Profit (Loss)		3,846	3,989	8,029		8,150
Segment Reporting Information, Net Assets		106,493		106,493
Segment Reporting Information, Net Assets				109,390
Division IV
Segment Reporting Information, Revenue for Reportable Segment		9,186	9,360	18,977		18,405
Profit (Loss)		2,650	3,026	5,843		6,069
Segment Reporting Information, Net Assets		123,152		123,152
Segment Reporting Information, Net Assets				123,652
Division V
Segment Reporting Information, Revenue for Reportable Segment		6,276	5,624	12,837		11,192
Profit (Loss)		1,740	1,490	3,737		3,022
Segment Reporting Information, Net Assets		68,824		68,824
Segment Reporting Information, Net Assets				68,269
Division VII
Segment Reporting Information, Revenue for Reportable Segment		5,987	5,502	12,291		10,682
Profit (Loss)		1,450	1,209	2,746		2,464
Segment Reporting Information, Net Assets		75,682		75,682
Segment Reporting Information, Net Assets				73,116
Division VIII
Segment Reporting Information, Revenue for Reportable Segment		5,198	4,856	10,914		9,540
Profit (Loss)		1,107	1,066	2,510		2,264
Segment Reporting Information, Net Assets		58,009		58,009
Segment Reporting Information, Net Assets				59,100
Division IX
Segment Reporting Information, Revenue for Reportable Segment		7,701	8,093	16,207		16,099
Profit (Loss)		2,192	2,568	5,175		5,662
Segment Reporting Information, Net Assets		94,433		94,433
Segment Reporting Information, Net Assets				98,875
Segment Reporting Information, Revenue for Reportable Segment		62,109	60,689	128,541		119,774
Profit (Loss)		19,399	19,921	41,461		$ 40,865
Segment Reporting Information, Net Assets		730,575		730,575
Segment Reporting Information, Net Assets				740,448
Reconciliation of Revenues
Total revenues from reportable divisions		62,109	59,085	128,541	$ 119,774
Corporate finance charges earned not allocated to divisions		21	34	52	65
Corporate investment income earned not allocated to divisions		1,669	1,788	3,449	3,672
Timing difference of insurance income allocation to divisions		1,531	1,837	3,830	3,403
Other revenue not allocated to divisions		3	4	5	7
Consolidated Revenues	[1]	65,333	62,748	135,877	126,921
Profit per division		19,399	19,921	41,461	40,865
Corporate earnings not allocated		3,224	3,484	7,336	7,147
Corporate expenses not allocated		(17,055)	(18,643)	(40,394)	(37,923)
Consolidated Income Before Income Taxes		$ 5,568	$ 4,762	$ 8,403	$ 10,089

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