Note 10 - Retirement Plans (Details) - Components of Net Periodic Benefit Cost/(Income) for the Domestic and International Plans - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
United States Pension Plan of US Entity [Member]
Components of net periodic benefit cost
Interest cost	$ 607	$ 828	$ 1,215	$ 1,656
Expected return on plan assets	(717)	(1,039)	(1,435)	(2,078)
Recognized actuarial loss	203	130	406	260
Net periodic benefit cost/(income)	93	(81)	186	(162)
Foreign Pension Plan [Member]
Components of net periodic benefit cost
Service cost	195	175	392	353
Interest cost	147	230	296	464
Recognized actuarial loss	83	39	166	79
Amortization of prior service benefit	(2)	(2)	(3)	(4)
Net periodic benefit cost/(income)	$ 423	$ 442	$ 851	$ 892