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Employee Benefit Plans (Amounts Recognized in Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Amounts recognized in the consolidated balance sheets
Accrued expenses and other current liabilities	$ 1,014	$ 1,309
Other long-term liabilities	870	1,779
Net amount recognized	1,884	3,088
Postretirement Benefits
Amounts recognized in the consolidated balance sheets
Accrued expenses and other current liabilities	1,310	1,292
Other long-term liabilities	24,014	23,580
Net amount recognized	$ 25,324	$ 24,872

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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.

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