Defined Benefit Pension Plans - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2020
Defined Contribution Plan Disclosure [Line Items]
Contributions paid or to be paid by employer	$ 954	$ 852
Scenario, Forecast [Member]
Defined Contribution Plan Disclosure [Line Items]
Contributions paid or to be paid by employer			$ 1,208