Note 8 - Changes in Accumulated Other Comprehensive Income (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	$ (23,015)	$ 10,552	$ (11,410)	$ 9,990
Other comprehensive income/(loss) before reclassifications	(1,127)	(15,172)	(12,732)	(19,010)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	4,400
Net current-period other comprehensive income/(loss)	(1,127)	(15,172)	(12,732)	(14,610)
Ending balance	(24,142)	(4,620)	(24,142)	(4,620)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Beginning balance	(70)	(330)	(193)	(396)
Other comprehensive income/(loss) before reclassifications	0	(3)	(23)	(86)
Amounts reclassified from accumulated other comprehensive loss	70	77	216	226
Net current-period other comprehensive income/(loss)	70	74	193	140
Ending balance	0	(256)	0	(256)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Beginning balance	(32,917)	(28,266)	(33,378)	(28,556)
Other comprehensive income/(loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	230	143	691	433
Net current-period other comprehensive income/(loss)	230	143	691	433
Ending balance	(32,687)	(28,123)	(32,687)	(28,123)
Beginning balance	(56,002)	(18,044)	(44,981)	(18,962)
Other comprehensive income/(loss) before reclassifications	(1,127)	(15,175)	(12,755)	(19,096)
Amounts reclassified from accumulated other comprehensive loss	300	220	907	5,059
Net current-period other comprehensive income/(loss)	(827)	(14,955)	(11,848)	(14,037)
Ending balance	$ (56,829)	$ (32,999)	$ (56,829)	$ (32,999)