Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Loan	Dec. 31, 2012 Loan	Dec. 31, 2011 Loan
Troubled Debt Restructurings
Troubled Debt Restructurings, Number of Loans	63	198	338
Troubled Debt Restructurings, Pre-Modification Recorded Balance	$ 29,046	$ 90,747	$ 158,295
Troubled Debt Restructurings, Post-Modification Recorded Balance	29,359	89,558	155,827
TDRs that Subsequently Defaulted, Number of Loans	5	14	66
TDRs that Subsequently Defaulted, Recorded Balance	849	8,304	41,236
Residential Real Estate
Troubled Debt Restructurings
Troubled Debt Restructurings, Number of Loans	9	11	20
Troubled Debt Restructurings, Pre-Modification Recorded Balance	1,907	2,280	13,500
Troubled Debt Restructurings, Post-Modification Recorded Balance	2,293	2,281	13,452
TDRs that Subsequently Defaulted, Number of Loans	1	0	4
TDRs that Subsequently Defaulted, Recorded Balance	265	0	2,291
Commercial Real Estate
Troubled Debt Restructurings
Troubled Debt Restructurings, Number of Loans	21	85	120
Troubled Debt Restructurings, Pre-Modification Recorded Balance	20,334	57,382	109,593
Troubled Debt Restructurings, Post-Modification Recorded Balance	20,334	56,120	107,778
TDRs that Subsequently Defaulted, Number of Loans	1	4	29
TDRs that Subsequently Defaulted, Recorded Balance	79	6,192	32,615
Other Commercial
Troubled Debt Restructurings
Troubled Debt Restructurings, Number of Loans	23	75	149
Troubled Debt Restructurings, Pre-Modification Recorded Balance	6,087	28,639	20,446
Troubled Debt Restructurings, Post-Modification Recorded Balance	6,087	28,711	20,434
TDRs that Subsequently Defaulted, Number of Loans	3	6	22
TDRs that Subsequently Defaulted, Recorded Balance	505	1,753	2,718
Home Equity
Troubled Debt Restructurings
Troubled Debt Restructurings, Number of Loans	2	10	22
Troubled Debt Restructurings, Pre-Modification Recorded Balance	147	1,358	9,198
Troubled Debt Restructurings, Post-Modification Recorded Balance	147	1,358	9,200
TDRs that Subsequently Defaulted, Number of Loans	0	3	7
TDRs that Subsequently Defaulted, Recorded Balance	0	301	3,202
Other Consumer
Troubled Debt Restructurings
Troubled Debt Restructurings, Number of Loans	8	17	27
Troubled Debt Restructurings, Pre-Modification Recorded Balance	571	1,088	5,558
Troubled Debt Restructurings, Post-Modification Recorded Balance	498	1,088	4,963
TDRs that Subsequently Defaulted, Number of Loans	0	1	4
TDRs that Subsequently Defaulted, Recorded Balance	$ 0	$ 58	$ 410