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Other Long-term Liabilities Other Long-term Liabilities (Notes)
 6 Months Ended
Jun. 30, 2021
Other Liabilities Disclosure [Abstract]  
Other Liabilities Disclosure [Text Block] Other long-term liabilities
Other long-term liabilities consist of the following components (dollars in thousands):
 June 30,
2021		December 31,
2020
Non-current asbestos-related liabilities$24,810 $26,170 
Other long-term liabilities36,620 43,520 
Total other long-term liabilities$61,430 $69,690