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Goodwill and Other Intangible Assets Carrying Amount and Accumulated Amortization of Intangible Assets (Details) - Customer Relationships - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Other Intangible Assets    
Gross Amortizable Asset - Customer Relationships $ 109,752 $ 109,752
Less: Accumulated Amortization - Customer Relationships 13,105 6,552
Total Other Intangible Assets, net $ 96,647 $ 103,200