Note 10 - Segment Financial Information: Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Division I
Segment Reporting Information, Revenue for Reportable Segment	$ 9,838	$ 7,900	$ 27,749	$ 22,435
Profit (Loss)	3,828	2,907	10,049	7,876
Segment Reporting Information, Net Assets	101,419		101,419
Segment Reporting Information, Net Assets			86,315
Division II
Segment Reporting Information, Revenue for Reportable Segment	9,363	8,389	27,357	24,405
Profit (Loss)	4,103	3,715	11,379	10,269
Segment Reporting Information, Net Assets	104,701		104,701
Segment Reporting Information, Net Assets			96,884
Division III
Segment Reporting Information, Revenue for Reportable Segment	9,067	8,435	26,565	24,385
Profit (Loss)	3,759	3,521	11,327	10,313
Segment Reporting Information, Net Assets	98,198		98,198
Segment Reporting Information, Net Assets			89,411
Division IV
Segment Reporting Information, Revenue for Reportable Segment	9,580	8,729	27,985	25,789
Profit (Loss)	3,044	3,126	9,113	9,216
Segment Reporting Information, Net Assets	119,514		119,514
Segment Reporting Information, Net Assets			107,401
Division V
Segment Reporting Information, Revenue for Reportable Segment	5,852	5,250	17,044	15,422
Profit (Loss)	1,535	1,539	4,557	4,806
Segment Reporting Information, Net Assets	63,258		63,258
Segment Reporting Information, Net Assets			56,240
Division VII
Segment Reporting Information, Revenue for Reportable Segment	5,773	4,116	16,455	11,318
Profit (Loss)	1,153	864	3,617	1,882
Segment Reporting Information, Net Assets	69,186		69,186
Segment Reporting Information, Net Assets			55,032
Division VIII
Segment Reporting Information, Revenue for Reportable Segment	5,212	4,170	14,752	12,070
Profit (Loss)	1,180	943	3,444	2,727
Segment Reporting Information, Net Assets	55,646		55,646
Segment Reporting Information, Net Assets			45,518
Division IX
Segment Reporting Information, Revenue for Reportable Segment	8,636	7,529	25,188	21,934
Profit (Loss)	3,165	2,752	9,146	8,141
Segment Reporting Information, Net Assets	94,842		94,842
Segment Reporting Information, Net Assets			84,381
Segment Reporting Information, Revenue for Reportable Segment	63,321	54,518	183,095	157,758
Profit (Loss)	21,767	19,367	62,632	55,230
Segment Reporting Information, Net Assets	706,764		706,764
Segment Reporting Information, Net Assets			621,182
Reconciliation of Revenues
Total revenues from reportable divisions	63,321	54,518	183,095	157,758
Corporate finance charges earned not allocated to divisions	41	28	106	79
Corporate investment income earned not allocated to divisions	1,836	1,789	5,508	5,306
Timing difference of insurance income allocation to divisions	2,018	2,185	5,421	5,169
Other revenue not allocated to divisions	2	2	9	34
Consolidated Revenues	67,218	58,522	194,139	168,346
Profit per division	21,767	19,366	62,632	55,229
Corporate earnings not allocated	3,896	4,004	11,043	10,588
Corporate expenses not allocated	(21,246)	(16,329)	(59,169)	(46,224)
Income Taxes not allocated	(983)	(833)	(2,707)	(2,411)
Consolidated Net Income	$ 3,434	$ 6,208	$ 11,799	$ 17,182