Note 5 - Disclosure of Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Beginning Balance	$ (7,361)		$ 1,188		$ (1,878)		$ 1,204
Other comprehensive loss before reclassifications	(1,072)		(2,014)		(6,555)		(2,030)
Net current-period other comprehensive loss	(1,072)		(2,014)		(6,555)		(2,030)
Ending Balance	(8,433)		(826)		(8,433)		(826)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Beginning Balance	$ (13,243)		$ (4,393)		$ (13,243)		$ (4,393)
Other comprehensive loss before reclassifications
Net current-period other comprehensive loss
Ending Balance	$ (13,243)		$ (4,393)		$ (13,243)		$ (4,393)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Beginning Balance	(1,652)		(934)		(646)		774
Other comprehensive loss before reclassifications	(1,065)	[1]	989	[2]	(2,071)	[3]	(719)	[4]
Net current-period other comprehensive loss	(1,065)		989		(2,071)		(719)
Ending Balance	(2,717)		55		(2,717)		55
Beginning Balance	(22,256)		(4,139)		(15,767)		(2,415)
Other comprehensive loss before reclassifications	(2,137)		(1,025)		(8,626)		(2,749)
Net current-period other comprehensive loss	(2,137)		(1,025)		(8,626)		(2,749)
Ending Balance	$ (24,393)		$ (5,164)		$ (24,393)		$ (5,164)

[1] Represents unrealized losses of $(1,727), net of tax benefit of $662 for the three months ended September 30, 2015.

[2] Represents unrealized gains of $1,538, net of tax effect of $(549) for the three months ended September 30, 2014.

[3] Represents unrealized losses of $(3,370), net of tax benefit of $1,299 for the nine months ended September 30, 2015.

[4] Represents unrealized losses of $(1,132), net of tax benefit of $413 for the nine months ended September 30, 2014.