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Other Long-term Liabilities Other Long-term Liabilities (Tables)
 3 Months Ended
Mar. 31, 2021
Other Liabilities Disclosure [Abstract]  
Other Noncurrent Liabilities [Table Text Block]
Other long-term liabilities consist of the following components (dollars in thousands):
 March 31,
2021		December 31,
2020
Non-current asbestos-related liabilities$25,420 $26,170 
Other long-term liabilities35,870 43,520 
Total other long-term liabilities$61,290 $69,690