Loans And Allowance For Loan Losses (Additional Information About Impaired Loans Held) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Recorded Investment	$ 139,255		$ 145,360
Unpaid Principal Balance	180,048		194,609
Related Allowance	10,758		9,370
Interest Income Recognized	3,611	[1]	2,867	[1]
With No Related Allowance Recorded [Member]
Recorded Investment	35,796		39,523
Unpaid Principal Balance	55,348		66,935
With An Allowance Recorded [Member]
Recorded Investment	103,459		105,837
Unpaid Principal Balance	124,700		127,674
Related Allowance	10,758		9,370
Interest Income Recognized	3,611	[1]	2,867	[1]
Business [Member] | With No Related Allowance Recorded [Member]
Recorded Investment	19,759		3,544
Unpaid Principal Balance	22,497		5,095
Business [Member] | With An Allowance Recorded [Member]
Recorded Investment	15,604		18,464
Unpaid Principal Balance	19,286		21,106
Related Allowance	1,500		1,665
Interest Income Recognized	284	[1]	395	[1]
Real Estate - Construction And Land [Member] | With No Related Allowance Recorded [Member]
Recorded Investment	8,391		30,979
Unpaid Principal Balance	22,746		55,790
Real Estate - Construction And Land [Member] | With An Allowance Recorded [Member]
Recorded Investment	37,387		39,719
Unpaid Principal Balance	47,516		52,587
Related Allowance	2,580		2,538
Interest Income Recognized	947	[1]	756	[1]
Real Estate - Business [Member] | With No Related Allowance Recorded [Member]
Recorded Investment	6,853		4,245
Unpaid Principal Balance	9,312		5,295
Real Estate - Business [Member] | With An Allowance Recorded [Member]
Recorded Investment	20,173		21,581
Unpaid Principal Balance	24,799		25,713
Related Allowance	2,588		1,924
Interest Income Recognized	327	[1]	387	[1]
Real Estate - Personal [Member] | With No Related Allowance Recorded [Member]
Recorded Investment	793		755
Unpaid Principal Balance	793		755
Real Estate - Personal [Member] | With An Allowance Recorded [Member]
Recorded Investment	7,867		7,294
Unpaid Principal Balance	10,671		9,489
Related Allowance	795		936
Interest Income Recognized	37	[1]	25	[1]
Consumer Credit Card [Member] | With An Allowance Recorded [Member]
Recorded Investment	22,428		18,779
Unpaid Principal Balance	22,428		18,779
Related Allowance	3,295		2,307
Interest Income Recognized	$ 2,016	[1]	$ 1,304	[1]

[1] Represents interest income recognized during the respective years on impaired loans held at December 31, 2011 and December 31, 2010. Interest shown is interest recognized on accruing restructured loans as noted above.