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Goodwill and Other Intangible Assets (Schedule of Estimated Amortization Expense) (Details)
$ in Thousands
Jun. 30, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2018 $ 6,234
2019 6,234
2020 6,234
2021 6,163
2022 $ 3,949