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Goodwill and Other Intangible Assets (Narratives) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Goodwill And Other Intangible Assets Disclosure [Abstract]    
Amortization of intangible assets $ 1,430 $ 1,103
Estimated Amortization Expense Next Twelve Months 5,600  
Estimated Amortization Expense Year 2 5,600  
Estimated Amortization Expense Year 3 5,600  
Estimated Amortization Expense Year 4 5,500  
Estimated Amortization Expense Year 5 $ 5,400