Loans (Activity In The Allowance For Loan Losses By Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 110,147	$ 126,316
Provision for loan losses	1,100	9,450
Charge-offs	(8,128)	(14,596)
Recoveries	4,062	3,151
Net charge-offs	(4,066)	(11,445)
Ending balance	107,181	124,321
Loans individually evaluated for impairment	20,816	38,705
Loans collectively evaluated for impairment	86,365	85,616
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	42,774	57,789
Provision for loan losses	4,766	1,841
Charge-offs	(3,012)	(7,597)
Recoveries	1,341	767
Net charge-offs	(1,671)	(6,830)
Ending balance	45,869	52,800
Loans individually evaluated for impairment	17,842	31,065
Loans collectively evaluated for impairment	28,027	21,735
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	20,912	28,534
Provision for loan losses	1,441	(662)
Charge-offs	(2,842)	(3,877)
Recoveries	492	556
Net charge-offs	(2,350)	(3,321)
Ending balance	20,003	24,551
Loans individually evaluated for impairment	2,879	7,640
Loans collectively evaluated for impairment	17,124	16,911
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	3,540	3,223
Provision for loan losses	(75)	792
Charge-offs	(289)	(820)
Recoveries	523	290
Net charge-offs	234	(530)
Ending balance	3,699	3,485
Loans individually evaluated for impairment	95
Loans collectively evaluated for impairment	3,604	3,485
Consumer And Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	12,635	11,974
Provision for loan losses	(3,641)	1,731
Charge-offs	(1,985)	(2,302)
Recoveries	1,706	1,538
Net charge-offs	(279)	(764)
Ending balance	8,715	12,941
Loans collectively evaluated for impairment	8,715	12,941
Unallocated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	30,286	24,796
Provision for loan losses	(1,391)	5,748
Ending balance	28,895	30,544
Loans collectively evaluated for impairment	$ 28,895	$ 30,544