Note 12 - Accumulated Other Comprehensive (Loss) - AOCI Change (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) Net Of Tax, Beginning of Period	$ (13,577)	$ 10,535
Other comprehensive income (loss) before reclassifications	$ 534	$ (12,928)
Net (gain) loss reclassified from accumulated other comprehensive income (loss)
Net current period other comprehensive income (loss)	$ 534	$ (12,928)
Accumulated Other Comprehensive Income (Loss) Net Of Tax, End of Period	(13,043)	(2,393)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) Net Of Tax, Beginning of Period	7	325
Other comprehensive income (loss) before reclassifications	(337)	(919)
Net (gain) loss reclassified from accumulated other comprehensive income (loss)	276	595
Net current period other comprehensive income (loss)	(61)	(324)
Accumulated Other Comprehensive Income (Loss) Net Of Tax, End of Period	(54)	1
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) Net Of Tax, Beginning of Period	$ (9,518)	$ (5,831)
Other comprehensive income (loss) before reclassifications
Net (gain) loss reclassified from accumulated other comprehensive income (loss)
Net current period other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) Net Of Tax, End of Period	$ (9,518)	$ (5,831)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) Net Of Tax, Beginning of Period	(23,088)	5,029
Other comprehensive income (loss) before reclassifications	197	(13,847)
Net (gain) loss reclassified from accumulated other comprehensive income (loss)	276	595
Net current period other comprehensive income (loss)	473	(13,252)
Accumulated Other Comprehensive Income (Loss) Net Of Tax, End of Period	(22,615)	$ (8,223)
Accumulated Other Comprehensive Income (Loss) Net Of Tax, Beginning of Period	(23,088)
Accumulated Other Comprehensive Income (Loss) Net Of Tax, End of Period	$ (22,615)