Income Taxes - Provision (Benefit) For Income Taxes Differences (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Contingency [Line Items]
Federal Statutory Income Tax Rate, Amount	$ 3,722	$ (10,926)	$ (4,245)
Change in Domestic Deferred Tax Assets Valuation Allowance	(7,080)	4,099	(19,691)
Effective Income Tax Rate Reconciliation, Undistributed Earnings of Foreign Subsidiaries	2,127	(231)	18,502
Other Adjustments, Amount	1,789	(286)	5,766
Expired foreign tax credits	4,766	0	0
Effect of Business Combination	0	(648)	0
Foreign Income Tax Rate Differential, Amount	1,835	2,415	4,660
Change in Domestic Deferred Tax Assets Option Valuation	(3,745)	7,381	0
Nondeductible Expense, Other, Amount	(937)	126	217
State and Local Income Taxes, Amount	(35)	267	(53)
Tax Contingency, Foreign, Amount	108	998	1,119
Change in Foreign Tax Law Valuation Allowance	144	981	0
Change in Foreign Deferred Tax Assets Valuation Allowance	983	(200)	1,378
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	613	2,030	(2,426)
Provision for income taxes	4,290	6,006	5,227
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation	$ 900	600
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation			(3,400)
China
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Percent	25.00%
Mexico
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, Percent	30.00%
China and Mexico [Member]
Income Tax Contingency [Line Items]
Provision for income taxes	$ 3,100	$ 3,200	$ 6,400