Note 11 - Components of Net Periodic Benefit Cost (Income) for the Domestic and International Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
United States Pension Plan of US Entity [Member]
Components of net periodic benefit cost
Interest cost	$ 598	$ 607	$ 1,195	$ 1,215
Expected return on plan assets	(662)	(717)	(1,324)	(1,435)
Recognized actuarial loss	194	203	388	406
Net periodic benefit cost	130	93	259	186
Foreign Pension Plan [Member]
Components of net periodic benefit cost
Interest cost	187	147	374	296
Recognized actuarial loss	49	83	98	166
Net periodic benefit cost	422	423	845	851
Service cost	187	195	375	392
Amortization of prior service benefit	$ (1)	$ (2)	$ (2)	$ (3)