Note 8 - Accumulated Other Comprehensive Income/(Loss) (Details) - Reclassifications Out of Accumulated Other Comprehensive Income/(Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense, net	$ (474)	$ (543)	$ (950)	$ (1,065)
Tax benefit	9,472	(9,415)	13,239	(8,961)
Amounts reclassified from accumulated other comprehensive loss	19,663	19,667	27,656	20,649
Foreign currency translation adjustment:
Release of currency translation adjustment		(4,272)	(4)	(4,618)
Amortization of defined benefit pension items:
Selling, general, and administrative expenses	14,078	14,560	27,829	26,193
Total before tax	28,922	10,412	41,057	12,032
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amounts reclassified from accumulated other comprehensive loss	(304)	(4,620)	(607)	(4,839)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest expense, net	(112)	(116)	(225)	(230)
Tax benefit	39	41	79	81
Amounts reclassified from accumulated other comprehensive loss	(73)	(75)	(146)	(149)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Amortization of defined benefit pension items:
Cost of goods sold, selling, general, and administrative expenses	(326)	(202)	(651)	(405)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Amortization of defined benefit pension items:
Selling, general, and administrative expenses	(13)	(13)	(26)	(25)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Tax benefit	108	70	216	140
Amounts reclassified from accumulated other comprehensive loss	(231)	(145)	(461)	(290)
Amortization of defined benefit pension items:
Total before tax	$ (339)	(215)	$ (677)	(430)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Tax benefit		0		0
Amounts reclassified from accumulated other comprehensive loss		(4,400)		(4,400)
Foreign currency translation adjustment:
Release of currency translation adjustment		$ (4,400)		$ (4,400)