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Revenue Recognition (Tables)
 6 Months Ended
Sep. 30, 2020
Revenue from Contract with Customer [Abstract]  
Deposit Liabilities Disclosures [Text Block]
Customer advances (contract liabilities)September 30, 2020September 30, 2019
March 31, beginning balance$10,796 $11,501 
Additional customer advances received18,533 19,596 
Revenue recognized from customer advances(15,754)(17,141)
Other (1)709 (326)
September 30, ending balance$14,284 $13,630 
Accounts Receivable, Allowance for Credit Loss
The following table illustrates the balance and related activity for the allowance for doubtful accounts that is deducted from accounts receivable to present the net amount expected to be collected in the six months ending September 30, 2020 (in thousands):

Allowance for doubtful accountsSeptember 30, 2020
March 31, beginning balance$5,056 
Bad debt expense2,364 
Less uncollectible accounts written off, net of recoveries(1,218)
Other (1)93 
September 30, ending balance$6,295 
Disaggregation of Revenue The following table illustrates the disaggregation of revenue by product grouping for the three and six months ending September 30, 2020 and September 30, 2019 (in thousands):
Three Months EndedSix Months Ended
Net Sales by Product GroupingSeptember 30, 2020September 30, 2019September 30, 2020September 30, 2019
Industrial Products$67,321 $89,902 $121,038 $183,392 
Crane Solutions71,643 96,597 $140,632 $195,240 
Engineered Products18,830 21,101 $35,157 $41,661 
All other(4)9 $33 $28 
Total$157,790 $207,609 $296,860 $420,321