Note 10 - Segment Financial Information: Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Segment Reporting Information, Revenue for Reportable Segment	$ 45,909	$ 44,890	$ 94,010	$ 91,649
Profit (Loss)	18,417	19,742	39,485	41,055
Segment Reporting Information, Net Assets	424,432		424,432		$ 442,257
Division I
Segment Reporting Information, Revenue for Reportable Segment	6,525	6,205	13,414	12,745
Profit (Loss)	2,243	2,439	4,807	5,042
Segment Reporting Information, Net Assets	56,365		56,365		57,964
Division II
Segment Reporting Information, Revenue for Reportable Segment	11,221	10,875	23,060	22,281
Profit (Loss)	5,192	5,209	11,270	11,106
Segment Reporting Information, Net Assets	101,481		101,481		106,362
Division III
Segment Reporting Information, Revenue for Reportable Segment	10,162	10,313	20,885	21,206
Profit (Loss)	4,428	4,861	9,556	10,281
Segment Reporting Information, Net Assets	94,037		94,037		98,627
Division IV
Segment Reporting Information, Revenue for Reportable Segment	9,563	9,298	19,415	18,688
Profit (Loss)	3,573	3,920	7,548	7,857
Segment Reporting Information, Net Assets	100,424		100,424		103,094
Division V
Segment Reporting Information, Revenue for Reportable Segment	8,438	8,199	17,236	16,729
Profit (Loss)	2,981	$ 3,313	6,304	$ 6,769
Segment Reporting Information, Net Assets	$ 72,125		$ 72,125		$ 76,210