Note 9 - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Beginning balance	$ (25,880)	$ (11,410)
Other comprehensive income/(loss) before reclassifications	$ 7,095	$ (17,983)
Amounts reclassified from accumulated other comprehensive loss
Net current-period other comprehensive income/(loss)	$ 7,095	$ (17,983)
Ending balance	$ (18,785)	(29,393)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Beginning balance		(193)
Other comprehensive income/(loss) before reclassifications		(19)
Amounts reclassified from accumulated other comprehensive loss		73
Net current-period other comprehensive income/(loss)		54
Ending balance		(139)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Beginning balance	$ (29,569)	$ (33,378)
Other comprehensive income/(loss) before reclassifications
Amounts reclassified from accumulated other comprehensive loss	$ 202	$ 230
Net current-period other comprehensive income/(loss)	202	230
Ending balance	(29,367)	(33,148)
Beginning balance	(55,449)	(44,981)
Other comprehensive income/(loss) before reclassifications	7,095	(18,002)
Amounts reclassified from accumulated other comprehensive loss	202	303
Net current-period other comprehensive income/(loss)	7,297	(17,699)
Ending balance	$ (48,152)	$ (62,680)