Loans (Troubled Debt Restructurings) (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
Commercial Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	1		0		3		2
Pre-Modification Recorded Investment	$ 197	[1]	$ 0	[1]	$ 861	[1]	$ 215	[1]
Post-Modification Recorded Investment	197	[1]	0	[1]	861	[1]	215	[1]
Commercial Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	2		2		7		7
Pre-Modification Recorded Investment	375	[1]	561	[1]	1,625	[1]	1,292	[1]
Post-Modification Recorded Investment	375	[1]	561	[1]	1,625	[1]	1,292	[1]
Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	2		2		2		5
Pre-Modification Recorded Investment	651	[1]	427	[1]	651	[1]	1,310	[1]
Post-Modification Recorded Investment	651	[1]	427	[1]	651	[1]	1,310	[1]
Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring					2		1
Pre-Modification Recorded Investment					5	[1]	117	[1]
Post-Modification Recorded Investment					5	[1]	117	[1]
Class of Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans Modified as a Troubled Debt Restructuring	5		4		14		15
Pre-Modification Recorded Investment	1,223	[1]	988	[1]	3,142	[1]	2,934	[1]
Post-Modification Recorded Investment	$ 1,223	[1]	$ 988	[1]	$ 3,142	[1]	$ 2,934	[1]

[1] The recorded investment in troubled debt restructurings consists of unpaid principal balance, net of charge-offs and unamortized deferred loan origination fees and costs, at the time of the restructuring. For accruing troubled debt restructurings the recorded investment also includes accrued interest.