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FDIC Shared-Loss Agreements (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
FDIC-Assisted Acquisition [Abstract]      
FDIC indemnification asset, expense $ 0 $ (1,403) $ 8,040
(Repayment to) reimbursement to the FDIC for the termination of shared-loss agreements $ 0 $ (10,125) $ 1,573