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Other Non-Current Liabilities (Tables)	12 Months Ended
Other Non-Current Liabilities (Tables)	Dec. 31, 2020
Other Liabilities Noncurrent [Abstract]
Schedule of Other Non-Current Liabilities [Table Text Block]	2020 2019 Inactive subsidiary litigation and settlement reserve $ 542 $ 19,678 Non-current income taxes payable 8,500 8,500 Uncertain tax positions (includes interest and penalties) 28,961 24,609 Fair value of interest rate swaps 4,672 415 Environmental reserves 4,610 5,259 Deferred and other long-term compensation 6,257 6,625 Other 1,627 1,298 Total other non-current liabilities $ 55,169 $ 66,384