FDIC Shared-Loss Receivable (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
FDIC Shared-Loss Receivable [Abstract]
Net payment to the FDIC for termination of shared-loss agreements	$ 285		$ 285	$ 20,115
Termination of FDIC shared-loss agreements	0	$ 0	240	1,462
Loss on termination of FDIC share-loss agreements			(45)	(3,377)
FDIC shared-loss payable	100,203		100,203		$ 97,008
Net Impact from FDIC shared-loss termination	0	$ 0	(45)	$ 16,559
Loans and Leases Receivable, Gross, Carrying Amount, Covered	$ 70,400		$ 70,400		$ 84,800