Pension and Other Postretirement Benefits - Pension Obligations for all Defined Benefit Pension Plans (Details) - Pension Plan - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 80,996	$ 82,099
Accumulated benefit obligation	80,996	82,099
Fair value of plan assets	28,348	32,568
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	31,012	33,171
Accumulated benefit obligation	30,400	32,559
Fair value of plan assets	$ 19,147	$ 20,475