Retirement Plans - Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands |
Mar. 31, 2017 |
Mar. 31, 2016 |
|---|---|---|
| Defined Benefit Plan Disclosure [Line Items] | ||
| Defined benefit plan amounts recognized in balance sheet | $ (44,106) | $ (42,630) |
| Noncurrent assets | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Defined benefit plan amounts recognized in balance sheet | 46 | 0 |
| Accrued expenses | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Defined benefit plan amounts recognized in balance sheet | (1,222) | (1,321) |
| Other liabilities | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Defined benefit plan amounts recognized in balance sheet | $ (42,930) | $ (41,309) |