FDIC Shared-Loss Receivable (Changes in Receivable from FDIC) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Receivable From FDIC For Shared-Loss Agreements [Roll Forward]
Accretion of discounts and premiums, net	$ (600)	$ (2,375)
Receipt of payments from FDIC	2,760	9,871
Post-acquisition and other adjustments, net	(2,591)	(4,076)
Termination of FDIC shared-loss agreements	240	0
FDIC shared-loss receivable	$ 3,981	$ 7,474	$ 4,172	$ 4,054