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Segment and Geographic Information - Income Before Income Taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Net corporate interest expense $ (6,559) $ (7,923) $ (10,774)
Goodwill and intangible asset impairments 0 (17,674) (17,484)
Arbitration and claim settlements 0 0 (12,552)
Restructuring and other costs, net 0 (9,760)  
(Loss) Income Before Income Taxes 43,864 39,088 23,637
Segment Reconciling Items      
Segment Reporting Information [Line Items]      
Segment operating earnings 76,891 89,261 85,308
Unallocated corporate and shared costs and credits (14,386) (17,431) (7,699)
Net corporate interest expense (6,559) (7,923) (10,774)
Stock option expense (1,053) (1,122) (1,885)
Amortization of acquisition-related intangible assets (11,029) (11,653) (11,277)
Goodwill and intangible asset impairments 0 (17,674) (17,484)
Arbitration and claim settlements   0 (12,552)
Restructuring and other costs, net 0 8,133  
Gain (loss) on disposition of businesses, net 0 13,763 (0)
(Loss) Income Before Income Taxes $ 43,864 $ 39,088 $ 23,637