Quarterly report pursuant to Section 13 or 15(d)

Accounting and Reporting Changes - Additional Information (Detail)

v3.10.0.1
Accounting and Reporting Changes - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Reclassification of net benefit income $ 206 $ 119 $ 618 $ 358
ASU 2017-07 [Member] | Selling, General and Administrative Expense [Member]        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Reclassification of net benefit income   $ 30   $ 92
Reclassification of net benefit income [Extensible List]   us-gaap:OtherIncomeMember   us-gaap:OtherIncomeMember
ASU 2017-07 [Member] | Cost of Products Sold [Member]        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Reclassification of net benefit income   $ 89   $ 266
Reclassification of net benefit income [Extensible List]   us-gaap:OtherIncomeMember   us-gaap:OtherIncomeMember