Income Taxes Accounting for Uncertainty in Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at April 1	$ 17,752	$ 12,635	$ 8,678
Increase for current year tax positions	24	7,260	4,191
Reduction for prior year tax positions	(223)	(1,055)	(111)
Impact of changes in exchange rates	(878)	(1,088)	(123)
Reduction for settlements	0	0	0
Balance at March 31	16,675	17,752	$ 12,635
Unrecognized tax benefits, income tax penalties and interest accrued	(224)	109
Unrecognized tax benefits, interest on income taxes accrued	1,315	1,276
Unrecognized tax benefits, income tax penalties accrued	793	1,056
Unrecognized tax benefits, income tax penalties and interest expense, related to settlements	387
Unrecognized tax benefits including interest and taxes	18,784	$ 20,085
Unrecognized tax benefits, reductions resulting from lapse of applicable statute of limitations	688
Decrease for current year tax positions	613
Unrecognized tax benefits may decrease in the next twelve months	$ 333
Foreign Tax Authority [Member] | Minimum [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Income Tax Examination, Open Tax Years	3 years
Foreign Tax Authority [Member] | Maximum [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Income Tax Examination, Open Tax Years	6 years
State and Local Jurisdiction [Member] | Minimum [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Income Tax Examination, Open Tax Years	3 years
State and Local Jurisdiction [Member] | Maximum [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Income Tax Examination, Open Tax Years	6 years