Loans and Leases (Information on How Loans and Leases were Modified as a TDR) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014 Contract		Sep. 30, 2013 Contract		Sep. 30, 2014 Contract		Sep. 30, 2013 Contract
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	92		81		217		242
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 12,299	[1]	$ 11,414	[1]	$ 31,179	[1]	$ 50,174	[1]
Extended Maturity [Member] | 1-4 family [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	10		10		24		22
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,383	[1]	1,898	[1]	3,191	[1]	4,418	[1]
Extended Maturity [Member] | Home equity [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	4		10		18		20
Financing Receivable, Modifications, Post-Modification Recorded Investment	143	[1]	307	[1]	911	[1]	961	[1]
Extended Maturity [Member] | Commercial non-mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	0		0		4		2
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	356	[1]	7,520	[1]
Extended Maturity [Member] | Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	0		0		0		3
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	0	[1]	227	[1]
Extended Maturity [Member] | Finance Leases Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	1		0		1		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	492	[1]	0	[1]	492	[1]	0	[1]
Adjusted Interest Rates [Member] | 1-4 family [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	1		1		3		6
Financing Receivable, Modifications, Post-Modification Recorded Investment	103	[1]	654	[1]	448	[1]	1,888	[1]
Adjusted Interest Rates [Member] | Home equity [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	0		0		1		4
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	51	[1]	154	[1]
Adjusted Interest Rates [Member] | Commercial non-mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	0		0		1		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	0	[1]	25	[1]	0	[1]
Adjusted Interest Rates [Member] | Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	0		2		0		4
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	[1]	340	[1]	0	[1]	12,015	[1]
Rate and Maturity [Member] | 1-4 family [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	2		8		16		38
Financing Receivable, Modifications, Post-Modification Recorded Investment	275	[1]	1,142	[1]	3,522	[1]	7,213	[1]
Rate and Maturity [Member] | Home equity [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	1		3		6		13
Financing Receivable, Modifications, Post-Modification Recorded Investment	110	[1]	164	[1]	412	[1]	1,381	[1]
Rate and Maturity [Member] | Commercial non-mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	5		12		18		19
Financing Receivable, Modifications, Post-Modification Recorded Investment	342	[1]	353	[1]	974	[1]	982	[1]
Other [Member] | 1-4 family [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	32		5		47		30
Financing Receivable, Modifications, Post-Modification Recorded Investment	7,600	[1]	1,177	[1]	10,433	[1]	5,611	[1]
Other [Member] | Home equity [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	34		28		73		78
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,750	[1]	811	[1]	3,717	[1]	3,197	[1]
Other [Member] | Commercial non-mortgage [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Modifications, Number of Contracts	2		2		5		3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 101	[1]	$ 4,568	[1]	$ 6,647	[1]	$ 4,607	[1]

[1] Post-modification balances approximate pre-modification balances. The aggregate amount of charge-offs as a result of the restructurings was not significant.