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Deposits - Additional Information (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Banking and Thrift [Abstract] |  |
Certificates of deposits over $100,000, including brokered CDs | $ 754.8 | $ 575.2
Certificates of deposits over $250,000, including brokered CDs | $ 347.5 | $ 256.0

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