Note 8 - Pension - Pretax Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Net actuarial loss	$ 106,475	$ 114,200
Prior service cost (credit)	(2,351)	(2,447)
Total cost in AOCI	104,124	111,753
UNITED STATES
Net actuarial loss	88,703	105,468
Prior service cost (credit)
Total cost in AOCI	88,703	105,468
Foreign Plan [Member]
Net actuarial loss	17,772	8,732
Prior service cost (credit)	(2,351)	(2,447)
Total cost in AOCI	$ 15,421	$ 6,285