Portfolio Loans And Allowance For Loan Losses (Summary Of Activity In The Allowance For Credit Losses By Loan Portfolio) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 18,137	$ 14,578	$ 14,984	$ 14,606
Provision for loan losses	8,273	2,689	16,012	4,247
Loan charge-offs	(6,490)	(3,408)	(11,512)	(5,117)
Recoveries	96	164	532	287
Balance at End of Period	20,016	14,023	20,016	14,023
Commercial And Commercial Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	16,997	12,758	13,691	12,640
Provision for loan losses	8,195	2,704	16,095	4,300
Loan charge-offs	(6,422)	(3,068)	(11,381)	(4,617)
Recoveries	42	114	407	185
Balance at End of Period	18,812	12,508	18,812	12,508
Residential Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	484	754	504	799
Provision for loan losses	133	(11)	113	(16)
Loan charge-offs	0	(99)	0	(139)
Recoveries	0	1	0	1
Balance at End of Period	617	645	617	645
Second And Home Equity Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	479	777	556	858
Provision for loan losses	(62)	(25)	(144)	(74)
Loan charge-offs	(11)	(163)	(18)	(202)
Recoveries	9	11	21	18
Balance at End of Period	415	600	415	600
Other Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	177	289	233	309
Provision for loan losses	7	21	(52)	37
Loan charge-offs	(57)	(78)	(113)	(159)
Recoveries	45	38	104	83
Balance at End of Period	$ 172	$ 270	$ 172	$ 270