Defined Benefit Pension and Other Postretirement Benefit Plans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans			11
Pension
Defined Benefit Plan Disclosure
Contribution by employer			$ 5,900
Net periodic benefit (income) costs
Net service cost	$ 1,233	$ 1,307	3,699	$ 3,926
Interest cost	478	425	1,434	1,274
Expected return on net assets	(531)	(501)	(1,594)	(1,502)
Amortization:
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	107	91	322	271
Prior service cost	23	20	69	60
Total net periodic benefit (income) costs	1,310	1,342	3,930	4,029
Pension | Maximum
Defined Benefit Plan Disclosure
Estimated employer contribution in current fiscal year	9,000		$ 9,000
Pension | Europe
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans			6
Pension | Singapore
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans			1
Pension | Mexico
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans			2
Pension | JAPAN
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans			2
Other Benefits
Net periodic benefit (income) costs
Net service cost	0	0	$ 0	0
Interest cost	3	3	9	9
Expected return on net assets	0	0	0	0
Amortization:
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(39)	(47)	(116)	(141)
Prior service cost	0	0	0	0
Total net periodic benefit (income) costs	$ (36)	$ (44)	$ (107)	$ (132)