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Business and Summary of Significant Accounting Policies - Customer Relationship Intangibles (Details) - Customer Relationships - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]    
Intangibles amortization period (in years) 12 years  
Impairment on intangible assets $ 0 $ 0