Note 12 - Accumulated Other Comprehensive (Loss) - AOCI Change (Details) - USD ($)	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	$ (13,577,000)	$ 10,535,000
Other comprehensive income (loss) before reclassifications	2,692,000	$ (280,000)
Net (gains) reclassified from accumulated other comprehensive income
Net current period other comprehensive income (loss)	2,692,000	$ (280,000)
Accumulated Other Comprehensive Income (Loss) Net Of Tax	(10,885,000)	10,255,000
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	7,000	325,000
Other comprehensive income (loss) before reclassifications	(117,000)	(288,000)
Net (gains) reclassified from accumulated other comprehensive income		(19,000)
Net current period other comprehensive income (loss)	(117,000)	(307,000)
Accumulated Other Comprehensive Income (Loss) Net Of Tax	(110,000)	18,000
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	(9,518,000)	$ (5,831,000)
Other comprehensive income (loss) before reclassifications	0
Net (gains) reclassified from accumulated other comprehensive income
Net current period other comprehensive income (loss)	0
Accumulated Other Comprehensive Income (Loss) Net Of Tax	(9,518,000)	$ (5,831,000)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	(23,088,000)	5,029,000
Other comprehensive income (loss) before reclassifications	2,575,000	(568,000)
Net (gains) reclassified from accumulated other comprehensive income		(19,000)
Net current period other comprehensive income (loss)	2,575,000	(587,000)
Accumulated Other Comprehensive Income (Loss) Net Of Tax	(20,513,000)	$ 4,442,000
Accumulated Other Comprehensive Income (Loss) Net Of Tax	(23,088,000)
Accumulated Other Comprehensive Income (Loss) Net Of Tax	$ (20,513,000)