Note 6 - Employee Retirement Benefit Plans: Schedule of Costs of Retirement Plans, changes in benefit obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Pension Plan
Fair value of plan assets - end of year	$ 0	$ 29,721
Actual return on plan assets	0	1,547
Contributions	0	0
Benefits paid	0	(339)
Transfer out upon termination	0	(30,929)
Fair value of plan assets - end of year	0	0
Projected benefit obligation as of beginning of the year	0	64,831
Interest cost	0	617
Actuarial loss (gain)	0	1,690
Transfer of benefit obligation upon termination	0	(66,799)
Projected benefit obligation as of beginning of the year	0	0
Supplemental Executive Retirement Plan
Fair value of plan assets - end of year	0	0
Actual return on plan assets	0	0
Contributions	475	497
Benefits paid	(475)	(497)
Transfer out upon termination	0	0
Fair value of plan assets - end of year	0	0
Projected benefit obligation as of beginning of the year	5,320	4,871
Interest cost	190	177
Actuarial loss (gain)	(184)	769
Transfer of benefit obligation upon termination	0	0
Projected benefit obligation as of beginning of the year	$ 4,851	$ 5,320