FDIC Shared-Loss Receivable and Payable (Changes in Receivable from FDIC) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
FDIC Loss Share Receivable [Abstract]
Cash Paid To FDIC For Termination Of Loss Share Agreements	$ 20,100
FDIC Indemnification Asset [Roll Forward]
Beginning balance	4,054	$ 28,701	$ 93,397
FDIC Indemnification Asset, Acquisitions	0	0	5,106
Accretion of discounts and premiums, net	(4,734)	(10,899)	(43,422)
Receipt of payments from FDIC	21,059	33,296	1,286
Post-acquisition and other adjustments, net	(14,745)	(47,044)	(27,666)
FDIC Indemnification Asset, Disposals	(1,462)	0	0
Ending balance	4,172	4,054	28,701
Termination Of Federal Deposit Insurance Corporation Loss Share Clawback Payable	18,200
Gain (Loss) on Contract Termination	(3,377)	0	0
FDIC shared-loss payable	97,008	126,453
Clawback Liability Adjustment And Release Of Related Reserves	20,000
Net impact from FDIC shared-loss termination	16,559	0	$ 0
Loans and Leases Receivable, Gross, Carrying Amount, Covered	$ 84,800	$ 272,600