Investment Securities (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) security item	Dec. 31, 2014 USD ($)
Securities [Line Items]
Available-for-sale Securities Pledged as Collateral | $	$ 147.9	$ 174.9
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 | security	19
Number of securities, impaired for more than 12 months	3
State and Municipal Tax-Exempt [Member]
Securities [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions | security	23
Number of securities, impaired for more than 12 months	12
Number Of Impaired Municipal Securities, School Districts, Additional Private Insurance	10
Number Of Impaired Municipal Securities, Remaining	10
Number Of Impaired Municipal Securities School Districts State Qualified School Aid	13
Number Of Impaired Municipal Securities, School Districts, Insured	1
Number Of Impaired Municipal Securities, School Districts, Uninsured	4
Number Of Impaired Municipal Securities, Townships	5
Corporate Bonds [Member]
Securities [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions | security	17
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 | security	12
Number of securities, impaired for more than 12 months	0
Collateralized Mortgage Obligations GSE [Member]
Securities [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions | security	17
Number of securities, impaired for more than 12 months	12
Maximum [Member] | Mortgage Backed Securities [Member]
Securities [Line Items]
Unrealized loss of security from book value	2.10%
Maximum [Member] | State and Municipal Tax-Exempt [Member]
Securities [Line Items]
Unrealized loss of security from book value	5.12%
Maximum [Member] | Corporate Bonds [Member]
Securities [Line Items]
Unrealized loss of security from book value	3.55%
Maximum [Member] | US Government Agency Obligations [Member]
Securities [Line Items]
Unrealized loss of security from book value	0.81%
Maximum [Member] | Collateralized Mortgage Obligations GSE [Member]
Securities [Line Items]
Unrealized loss of security from book value	4.83%