Retirement Plans - Summary of Pension Plan Investments Measured at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
United States Plans
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	$ 13,928	$ 12,731	$ 11,839
United States Plans | Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	13,928	12,731
United States Plans | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	891	305
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	891	305
United States Plans | US Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	9,864	8,363
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	9,864	8,363
United States Plans | International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	0	1,050
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	1,050
United States Plans | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	3,173	3,013
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	3,173	3,013
International Plans
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	38,757	34,323	$ 32,314
International Plans | Quoted Price In Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	49	88
International Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	38,708	34,235
International Plans | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	49	88
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	49	88
International Plans | International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	25,768	22,727
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	25,768	22,727
International Plans | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Total Fair Value Measurement	12,940	11,508
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	$ 12,940	$ 11,508