Note 14- Retirement Plans - Components of Net Periodic Benefit Cost/(Credit) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
UNITED STATES
Components of net periodic benefit cost/(credit)
Interest cost	$ 543	$ 511	$ 1,629	$ 1,532
Expected return on plan assets	(682)	(792)	(2,047)	(2,376)
Recognized actuarial loss	207	180	622	539
Net periodic benefit cost/(credit)	68	(101)	204	(305)
International Pension Plan [Member]
Components of net periodic benefit cost/(credit)
Service cost	266	245	814	768
Interest cost	160	176	489	552
Recognized actuarial loss	111	93	340	292
Amortization of prior service benefit		(1)		(3)
Net periodic benefit cost/(credit)	$ 537	$ 513	$ 1,643	$ 1,609