Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Operating Loss Carryforwards [Line Items]
Gross amounts of deferred tax assets	$ 45,545	$ 37,765
Valuation allowance	(1,977)	(2,361)		(53,325)
Valuation allowance reversed			49,161
Foreign subsidiary income	10,570	11,459	18,322
Cumulative undistributed earnings of foreign subsidiaries	122,000
Tax effects of award plans	(65)	613
Amount accrued for the payment of interest and penalties	200	214
Federal
Operating Loss Carryforwards [Line Items]
Net operating losses utilized			14,567
Reduction in valuation allowance			5,107
Foreign net operating losses	$ 1,207	$ 1,976	$ 1,660