Quarterly report pursuant to Section 13 or 15(d)

Accounting and Repoting Changes - Additional Information (Detail)

v3.10.0.1
Accounting and Repoting Changes - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Reclassification of net benefit income $ 206 $ 119
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   $ 31
Reclassification of net benefit income [Extensible List]   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   $ 88
Reclassification of net benefit income [Extensible List]   us-gaap:OtherIncomeMember