Loans And Allowance For Loan Losses (Additional Information About Impaired Loans Held) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 25,230	$ 25,564
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	37,304	38,222
Impaired Financing Receivable, with Related Allowance, Recorded Investment	85,868	91,354
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	100,653	109,791
Impaired Financing Receivable, Related Allowance	11,117	7,485
Impaired Financing Receivable, Recorded Investment	111,098	116,918
Impaired Financing Receivable, Unpaid Principal Balance	137,957	148,013
Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	8,563	9,964
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	9,000	12,697
Impaired Financing Receivable, with Related Allowance, Recorded Investment	20,222	19,358
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	24,477	22,513
Impaired Financing Receivable, Related Allowance	3,082	1,888
Real Estate - Construction And Land [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	10,975	8,440
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	19,528	15,102
Impaired Financing Receivable, with Related Allowance, Recorded Investment	20,611	20,446
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	21,838	25,808
Impaired Financing Receivable, Related Allowance	2,808	1,762
Real Estate - Business [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	5,692	5,484
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	8,776	8,200
Impaired Financing Receivable, with Related Allowance, Recorded Investment	13,794	17,115
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	20,119	23,888
Impaired Financing Receivable, Related Allowance	2,455	1,784
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	1,166
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	1,380
Impaired Financing Receivable, with Related Allowance, Recorded Investment	11,952	14,157
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	14,930	17,304
Impaired Financing Receivable, Related Allowance	1,536	857
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4,548	4,779
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	4,548	4,779
Impaired Financing Receivable, Related Allowance	116	93
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	510
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	843
Impaired Financing Receivable, with Related Allowance, Recorded Investment	810	779
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	810	779
Impaired Financing Receivable, Related Allowance	35	18
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	13,931	14,720
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	13,931	14,720
Impaired Financing Receivable, Related Allowance	$ 1,085	$ 1,083