Investment Securities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Securities [Line Items]
Available-for-sale Securities Pledged as Collateral	$ 174.9	$ 116.2
Percent of principal outstanding collected of held-to-maturity securities	85.00%
Mortgage Backed Securities [Member]
Securities [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	9
Number of securities, impaired for more than 12 months	4
State And Municipal Tax-Exempt [Member]
Securities [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	31
Number of securities, impaired for more than 12 months	26
Number Of Impaired Municipal Securities, School Districts, Additional Private Insurance	18
Number Of Impaired Municipal Securities, Remaining	9
Number Of Impaired Municipal Securities School Districts State Qualified School Aid	22
Number Of Impaired Municipal Securities, School Districts, Insured	4
Number Of Impaired Municipal Securities, School Districts, Uninsured	2
Number Of Impaired Municipal Securities, Townships	3
Corporate Bonds [Member]
Securities [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	7
Number of securities, impaired for more than 12 months	2
US Government Agency Obligations [Member]
Securities [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	11
Number of securities, impaired for more than 12 months	4
Collateralized Mortgage Obligations GSE [Member]
Securities [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	16
Number of securities, impaired for more than 12 months	12
Equity Securities [Member]
Securities [Line Items]
Number of securities, impaired for more than 12 months	5