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Acquisition (Amortization Expense) (Details) - Quarton - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Business Acquisition [Line Items]    
Amortization of Intangible Assets $ 2,200 $ 2,200
Scenario, Plan    
Business Acquisition [Line Items]    
2020 6,681  
2021 2,608  
2022 1,775  
2023 0  
2024 0  
Thereafter 0  
Finite-Lived Intangible Assets, Net $ 11,064