Loans And Allowance For Loan Losses (Troubled Debt Restructurings) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Contract	Dec. 31, 2014 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	262	272
Post-modification balance for loans modified or renewed	$ 80,386	$ 114,298
Write-down	$ 4,000	$ 163
Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	53	20
Post-modification balance for loans modified or renewed	$ 5,731	$ 2,786
Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	15	19
Post-modification balance for loans modified or renewed	$ 1,906	$ 3,602
Credit Card Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0
Post-modification balance for loans modified or renewed	$ 0	$ 0
Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	27	27
Post-modification balance for loans modified or renewed	$ 1,147	$ 1,229
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	66	99
Post-modification balance for loans modified or renewed	$ 56,424	$ 37,148
Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	11	15
Post-modification balance for loans modified or renewed	$ 32,025	$ 14,236
1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	43	68
Post-modification balance for loans modified or renewed	$ 22,253	$ 13,103
Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	12	16
Post-modification balance for loans modified or renewed	$ 2,146	$ 9,809
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	101	107
Post-modification balance for loans modified or renewed	$ 15,178	$ 69,533
Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	91	89
Post-modification balance for loans modified or renewed	$ 9,697	$ 31,267
Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	10	18
Post-modification balance for loans modified or renewed	$ 5,481	$ 38,266
Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	95	66
Post-modification balance for loans modified or renewed	$ 8,784	$ 7,617
Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	14,852	2,398
Principal Forgiveness [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Principal Forgiveness [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Principal Forgiveness [Member] | Credit Card Receivable [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Principal Forgiveness [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	14,823	2,338
Principal Forgiveness [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Principal Forgiveness [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	14,823	0
Principal Forgiveness [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	2,338
Principal Forgiveness [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	29	60
Principal Forgiveness [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	29	60
Principal Forgiveness [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Principal Forgiveness [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Below Market Interest Rate [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	41,222	59,020
Below Market Interest Rate [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	2,826	2,335
Below Market Interest Rate [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	1,011	2,735
Below Market Interest Rate [Member] | Credit Card Receivable [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Below Market Interest Rate [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	444	663
Below Market Interest Rate [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	30,333	19,817
Below Market Interest Rate [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	25,052	8,423
Below Market Interest Rate [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	4,667	6,611
Below Market Interest Rate [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	614	4,783
Below Market Interest Rate [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	6,608	33,470
Below Market Interest Rate [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	3,191	10,066
Below Market Interest Rate [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	3,417	23,404
Below Market Interest Rate [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	4,281	5,733
Term Extensions and/or Other Concessions [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	24,312	52,880
Term Extensions and/or Other Concessions [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	2,905	451
Term Extensions and/or Other Concessions [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	895	867
Term Extensions and/or Other Concessions [Member] | Credit Card Receivable [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	0	0
Term Extensions and/or Other Concessions [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	703	566
Term Extensions and/or Other Concessions [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	11,268	14,993
Term Extensions and/or Other Concessions [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	6,973	5,813
Term Extensions and/or Other Concessions [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	2,763	6,492
Term Extensions and/or Other Concessions [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	1,532	2,688
Term Extensions and/or Other Concessions [Member] | Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	8,541	36,003
Term Extensions and/or Other Concessions [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	6,477	21,141
Term Extensions and/or Other Concessions [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	2,064	14,862
Term Extensions and/or Other Concessions [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Post-modification balance for loans modified or renewed	$ 4,503	$ 1,884