Annual report pursuant to Section 13 and 15(d)

Acquisitions - Fair Value of Assets Identified and Liabilities Assumed (Details)

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Acquisitions - Fair Value of Assets Identified and Liabilities Assumed (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended 10 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2017
Mar. 31, 2019
Jul. 01, 2018
Jun. 30, 2017
Mar. 31, 2017
Feb. 28, 2017
Business Acquisition [Line Items]                  
Goodwill $ 9,800 $ 9,800 $ 17,558 $ 6,004          
American Stainless Tubing, Inc.                  
Business Acquisition [Line Items]                  
Inventories     5,564   $ 5,564        
Accounts Receivable     3,534   3,534        
Other current assets - production and maintenance supplies     605   605        
Property, plant and equipment     2,793   2,793        
Customer list intangible     9,504   10,000        
Goodwill     7,758   7,044        
Contingent consideration (earn-out liability)     (6,366)   (6,148)        
Accounts payable     (1,400)   (1,400)        
Other liabilities assumed     (97)   (97)        
Total consideration     21,895   $ 21,895        
Revisions                  
Inventories     0            
Property, plant and equipment     0            
Customer list intangible     (496)            
Goodwill     714            
Contingent consideration (earn-out liability)     (218)            
Total consideration     0            
MUSA-Galvanized                  
Business Acquisition [Line Items]                  
Inventories 2,746 2,746       $ 2,746      
Accounts Receivable 2,187 2,187       2,187      
Other current assets - production and maintenance supplies 747 747       747      
Property, plant and equipment 4,883 4,883       4,883      
Customer list intangible 1,173 1,173       1,424      
Goodwill 3,796 3,796       3,545      
Contingent consideration (earn-out liability) (3,800) (3,800)       (3,800)      
Accounts payable (1,051) (1,051)       (1,051)      
Other liabilities assumed (303) (303)       (303)      
Total consideration 10,378 10,378       $ 10,378      
Revisions                  
Inventories   0              
Property, plant and equipment   0              
Customer list intangible   (251)              
Goodwill $ 300 251              
Contingent consideration (earn-out liability)   0              
Total consideration   0              
MUSA-Stainless                  
Business Acquisition [Line Items]                  
Inventories       5,434         $ 5,434
Other current assets - production and maintenance supplies       1,548         1,548
Property, plant and equipment       7,577         7,577
Customer list intangible       992         992
Goodwill       4,649     $ 4,600 $ 3,600 3,589
Contingent consideration (earn-out liability)       (4,664)     $ (4,700) $ (3,600) (3,604)
Other liabilities assumed       (583)         (583)
Total consideration       14,953         $ 14,953
Revisions                  
Inventories       0          
Property, plant and equipment       0          
Customer list intangible       0          
Goodwill       1,059          
Contingent consideration (earn-out liability)       (1,059)          
Total consideration       0          
Accounts Receivable | American Stainless Tubing, Inc.                  
Revisions                  
Accounts receivable     0            
Accounts Receivable | MUSA-Galvanized                  
Revisions                  
Accounts receivable   0              
Other Current Assets | American Stainless Tubing, Inc.                  
Revisions                  
Accounts receivable     0            
Other Current Assets | MUSA-Galvanized                  
Revisions                  
Accounts receivable   0              
Other Current Assets | MUSA-Stainless                  
Revisions                  
Accounts receivable       0          
Accounts Payable | American Stainless Tubing, Inc.                  
Revisions                  
Accounts payable     0            
Accounts Payable | MUSA-Galvanized                  
Revisions                  
Accounts payable   0              
Other Liabilities | American Stainless Tubing, Inc.                  
Revisions                  
Accounts payable     $ 0            
Other Liabilities | MUSA-Galvanized                  
Revisions                  
Accounts payable   $ 0              
Other Liabilities | MUSA-Stainless                  
Revisions                  
Accounts payable       $ 0