Note 6 - Employee Benefit Plans (Details) - Components of net periodic benefit cost (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Defined Benefit Retirement Plan (Europe) [Member]
Note 6 - Employee Benefit Plans (Details) - Components of net periodic benefit cost [Line Items]
Service cost	$ 209	$ 113	$ 420	$ 229
Interest cost	2,366	2,542	4,756	5,086
Expected return on assets	(2,463)	(2,817)	(4,950)	(5,638)
Amortization of prior service cost	22	13	44	26
Recognized net actuarial losses	241	231	484	460
Net periodic benefit cost	375	82	754	163
Salary Continuation Plan (SCP) [Member]
Note 6 - Employee Benefit Plans (Details) - Components of net periodic benefit cost [Line Items]
Service cost	134	113	267	226
Interest cost	249	254	499	507
Amortization of prior service cost	12	12	24	24
Amortization of loss	110	67	221	134
Net periodic benefit cost	$ 505	$ 446	$ 1,011	$ 891