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Commitments and Contingencies (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
welds
Sep. 30, 2019
USD ($)
Apr. 30, 2017
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Jan. 01, 2020
USD ($)
Litigation              
Accounts receivable, net $ 135,997,000     $ 125,130,000      
Pension accrual 2,519,000     2,519,000      
Right to Customer Contracts | Disposal Group, Disposed of by Sale, Not Discontinued Operations              
Litigation              
Consideration received on sale of subsidiary             $ 100,000
Contingency charges       600,000      
Payments of severance obligations       300,000      
Reversal of severance obligations       600,000      
Foreign Subsidiaries | Products and Systems | Disposal Group, Disposed of by Sale, Not Discontinued Operations              
Litigation              
Term of agreement to purchase products from the buyer on sale of subsidiary           3 years  
Amount of purchased commitment to buy products from the buyer on sale of subsidiary       2,300,000      
Remaining balance under purchase commitment agreement       1,400,000      
Pension Related Contingencies              
Litigation              
Pension withdrawal expense   $ 900,000     $ 800,000 $ 5,900,000  
Monthly payments, excluding final settlement       3,300,000      
Total payments       4,200,000      
Severance and Labor Disputes | Germany | Affiliated Entity              
Litigation              
Temporary employment contract period     18 months        
Acquisition-related Contingencies              
Litigation              
Potential acquisition-related contingent consideration, low end of range       0      
Potential acquisition-related contingent consideration, high end of range       $ 5,700,000      
Contingent consideration payment period based upon achievement of specific performance metrics       2 years 5 months 1 day      
Various Pipeline Projects For Texas Customer              
Litigation              
Amount of damages claimed $ 7,600,000            
Texas Customer              
Litigation              
Accounts receivable, net       $ 1,400,000      
Number or welds not in compliance | welds 66            
Number of welds inspected | welds 16,000            
Amount of damages claimed $ 1,400,000            
Texas Customer | Various Pipeline Projects For Texas Customer              
Litigation              
Amount of damages claimed $ 1,400,000