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Other Long-term Liabilities Other Long-term Liabilities (Tables)
 9 Months Ended
Sep. 30, 2021
Other Liabilities Disclosure [Abstract]  
Other Noncurrent Liabilities [Table Text Block]
Other long-term liabilities consist of the following components (dollars in thousands):
 September 30,
2021		December 31,
2020
Non-current asbestos-related liabilities$24,250 $26,170 
Other long-term liabilities36,570 43,520 
Total other long-term liabilities$60,820 $69,690