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Goodwill and Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated Amortization Expense For Intangibles Subject To Amortization
The following table sets forth the estimated amortization expense for intangibles subject to amortization for the next five years and thereafter:

Period/Year Total Amortization Expense 
(in thousands)
2019$4,165 
2020$4,165 
2021$4,165 
2022$4,165 
2023$3,168 
Thereafter$6,690