FDIC Shared-Loss Payable (Changes in Receivable from FDIC) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
FDIC Shared-Loss Receivable [Abstract]
Loans and Leases Receivable, Gross, Carrying Amount, Covered			$ 55,600
FDIC shared-loss payable	$ 101,342	$ 97,008	$ 105,618
FDIC Indemnification Asset [Roll Forward]
Beginning balance	101,342	97,008
Accretion	4,023	3,851
Adjustments related to changes in assumptions	253	483
Ending balance	$ 105,618	$ 101,342