Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Income Tax Contingency [Line Items]
Intercompany dividends	$ 150,000,000	$ 130,000,000	$ 250,000,000
Expected future taxable income to realize deferred tax assets	104,483,000
Deferred tax assets OCL period increase (decrease)	297,000
Deferred tax assets valuation allowance	1,519,000	195,000
Tax credit carryforwards	410,000	36,000
Adjusted transition tax			57,895,000
US tax on deemed repatriated foreign earnings		6,348,000
Undistributed earnings of foreign subsidiaries	363,140,000
Non US subsidiary cash and cash equivalents	177,229,000
Undistributed earnings from foreign subsidiaries not subject to transition tax	8,620,000
Withholding tax	0
Income tax penalties and interest accrued	3,631,000	2,456,000
Income tax penalties and interest expense	1,176,000	(110,000)	369,000
Decrease in unrecognized tax benefit expected to settle in next twelve months	788,000
Unrecognized tax benefits	17,638,000	$ 10,942,000	$ 9,594,000	$ 11,727,000
Income Tax Expense (Benefit)
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefit expected to settle in next twelve months	563,000
Interest Expense
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefit expected to settle in next twelve months	$ 937,000