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Segments and Related Information - Financial Information by Business Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Segment Reporting Information [Line Items]              
Revenues $ 145,724   $ 146,245   $ 271,313 $ 365,939  
Depreciation and amortization 20,909   24,646   42,429 51,055  
Operating income (loss) (17,618)   (33,334)   (37,380) (475,136)  
Capital expenditures 3,191   3,034   7,311 8,915  
Total assets 1,115,724   1,246,883   1,115,724 1,246,883 $ 1,152,260
Impairment of operating lease assets 2,794            
Fixed assets 2,794 $ 650 2,992 $ 5,198 3,444 8,190  
Impairments of goodwill 0   0 406,056 0 406,056  
Impairments of inventories       25,230 0 25,230  
Corporate              
Segment Reporting Information [Line Items]              
Revenues 0   0   0 0  
Depreciation and amortization 189   183   383 344  
Operating income (loss) (8,543)   (8,723)   (17,908) (17,384)  
Capital expenditures 325   (511)   569 (396)  
Total assets 93,060   118,912   93,060 118,912  
Impairment of operating lease assets 0            
Fixed assets   0 0 0      
Impairments of goodwill       0      
Impairments of inventories       0      
Offshore/Manufactured Products              
Segment Reporting Information [Line Items]              
Revenues 76,908   94,936   137,517 186,108  
Impairments of goodwill           86,500  
Impairments of inventories           16,200  
Offshore/Manufactured Products | Operating Segments              
Segment Reporting Information [Line Items]              
Revenues 76,908   94,936   137,517 186,108  
Depreciation and amortization 5,557   5,476   11,026 11,104  
Operating income (loss) 4,810   9,419   5,881 (86,077)  
Capital expenditures 792   457   1,255 1,522  
Total assets 526,842   548,226   526,842 548,226  
Impairment of operating lease assets 0            
Fixed assets   0 0 0      
Impairments of goodwill       86,500      
Impairments of inventories       16,249      
Downhole Technologies              
Segment Reporting Information [Line Items]              
Revenues 26,760   14,965   52,190 56,030  
Impairments of goodwill           192,500  
Downhole Technologies | Operating Segments              
Segment Reporting Information [Line Items]              
Revenues 26,760   14,965   52,190 56,030  
Depreciation and amortization 4,521   5,619   8,910 11,203  
Operating income (loss) (2,295)   (11,110)   (3,910) (203,801)  
Capital expenditures 197   1,165   280 2,814  
Total assets 279,324   308,942   279,324 308,942  
Impairment of operating lease assets 0            
Fixed assets   0 0 0      
Impairments of goodwill       192,502      
Impairments of inventories       0      
Well Site Services              
Segment Reporting Information [Line Items]              
Revenues 42,056   36,344   81,606 123,801  
Impairments of goodwill           127,100  
Impairments of inventories           9,000  
Well Site Services | Completion Services              
Segment Reporting Information [Line Items]              
Impairment of operating lease assets 2,800            
Fixed assets   700 3,000   3,400    
Well Site Services | Well Site Services Drilling Services              
Segment Reporting Information [Line Items]              
Fixed assets       5,200   8,200  
Well Site Services | Operating Segments              
Segment Reporting Information [Line Items]              
Revenues 42,056   36,344   81,606 123,801  
Depreciation and amortization 10,642   13,368   22,110 28,404  
Operating income (loss) (11,590)   (22,920)   (21,443) (167,874)  
Capital expenditures 1,877   1,923   5,207 4,975  
Total assets 216,498   270,803   $ 216,498 $ 270,803  
Impairment of operating lease assets $ 2,794            
Fixed assets   $ 650 $ 2,992 5,198      
Impairments of goodwill       127,054      
Impairments of inventories       $ 8,981