Provision for Taxes (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Components of Deferred Tax Assets and Liabilities [Abstract]
Net operating losses potentially not utilized	$ 22,000
Unrecognized tax benefits	23,912	$ 19,929	$ 16,850
Tax expense (net of settlements)	4,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Unrecognized tax benefits, income tax penalties and interest accrued	5,900	$ 5,200
Unrecognized tax benefits, income tax penalties and interest expense	$ 700