Retirement Plans - Summary of Pension Plan Investments Measured at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
United States Plans
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	$ 13,763	$ 13,928	$ 12,731
United States Plans \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	13,763	13,928
United States Plans \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	1,080	891
United States Plans \| Cash and Cash Equivalents \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	1,080	891
United States Plans \| US Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	8,275	9,864
United States Plans \| US Equity Securities \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	8,275	9,864
United States Plans \| International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	0	0
United States Plans \| International Equity Securities \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	0	0
United States Plans \| Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	4,408	3,173
United States Plans \| Fixed Income Funds \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	4,408	3,173
International Plans
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	36,791	38,757	$ 34,323
International Plans \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	83	49
International Plans \| Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	36,708	38,708
International Plans \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	83	49
International Plans \| Cash and Cash Equivalents \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	83	49
International Plans \| International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	23,875	25,768
International Plans \| International Equity Securities \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	0
International Plans \| International Equity Securities \| Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	23,875	25,768
International Plans \| Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	12,833	12,940
International Plans \| Fixed Income Funds \| Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	0
International Plans \| Fixed Income Funds \| Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	$ 12,833	$ 12,940