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Goodwill And Other Intangible Assets (Other Intangible Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Other intangible assets, gross carrying amount $ 69,900 $ 69,900
Other intangible assets, accumulated amortization (24,788) (14,229)
Other intangible assets, net carrying amount 45,112 55,671
CDI    
Finite-Lived Intangible Assets [Line Items]    
Other intangible assets, gross carrying amount 57,400 57,400
Other intangible assets, accumulated amortization (19,829) (10,436)
Other intangible assets, net carrying amount 37,571 46,964
Other    
Finite-Lived Intangible Assets [Line Items]    
Other intangible assets, gross carrying amount 12,500 12,500
Other intangible assets, accumulated amortization (4,959) (3,793)
Other intangible assets, net carrying amount $ 7,541 $ 8,707