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Federal Home Loan Bank Advances (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Federal Home Loan Bank Advances [Abstract]    
Federal Home Loan Bank Advances, short term $ 0.0 $ 0.0
Federal Home Loan Bank Advances, long term 0.0 $ 0.0
Collateral on borrowing lines 753.6  
Borrowing capacity $ 617.8