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FDIC Shared-Loss Agreements (FDIC Indemnification Expense) (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)
Change in true-up payment obligation expense	0	0	(2,128)
Reimbursement to FDIC for recoveries	0	0	(3,413)
Final settlement with the FDIC on commercial loans	0	0	0
FDIC shared-loss expense, net	$ 0	$ 1,403	$ (13,581)