Retirement Plans - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Curtailment benefit			$ 8,020,000
Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan number of consecutive years of highest compensation			5 years
Defined benefit plan number of years of employment			10 years
Contributions made under defined benefit plan	$ 0	$ 0	$ 0	$ 0
Curtailment benefit			8,051,000
Qualified Plan [Member] | Cost of Revenues [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment benefit			2,700,000
Qualified Plan [Member] | General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment benefit			2,300,000
Qualified Plan [Member] | Selling and Distribution Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment benefit			2,400,000
Qualified Plan [Member] | Research and Development Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Curtailment benefit			$ 700,000