Note 12 - Accumulated Other Comprehensive (Loss) - AOCI Reclass (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Other-than-Temporary Impairment Attributable to Parent [Member]
Other income (expense), net	$ (151)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Income before Income Tax Provision	(151)
Tax impact	61
Total reclassifications for the period	(90)
Other income (expense), net	815	(790)
Income before Income Tax Provision	5,271	4,647
Tax impact	(2,252)	(1,662)
Total reclassifications for the period	$ 3,019	$ 2,985