Defined Benefit Pension and Other Postretirement Benefit Plans (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2018 USD ($) plan	Jun. 30, 2017 USD ($)
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans | plan	11
Pension
Defined Benefit Plan Disclosure
Contribution by employer	$ 3,400
Net periodic benefit (income) costs
Net service cost	1,233	$ 1,321
Interest cost	478	426
Expected return on net assets	(531)	(505)
Amortization:
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	107	90
Prior service cost	23	20
Total net periodic benefit (income) costs	1,310	1,352
Pension | Maximum
Defined Benefit Plan Disclosure
Estimated employer contribution in current fiscal year	$ 8,500
Pension | Europe
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans | plan	6
Pension | Singapore
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans | plan	1
Pension | Mexico
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans | plan	2
Pension | JAPAN
Defined Benefit Plan Disclosure
Defined Benefit Plan, Number of Plans | plan	2
Other Benefits
Net periodic benefit (income) costs
Net service cost	$ 0	0
Interest cost	3	3
Expected return on net assets	0	0
Amortization:
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(39)	(47)
Prior service cost	0	0
Total net periodic benefit (income) costs	$ (36)	$ (44)