Investment Securities Held-to-maturity Securities (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Held-to-maturity Securities
Amortized Cost	$ 48,468,000	$ 49,222,000
Gross Unrealized Gains	646,000	128,000
Gross Unrealized Losses	(672,000)	(3,256,000)
Fair Value	48,442,000	46,094,000
Gross realized gains or losses	0	0	0
States and political subdivisions
Schedule of Held-to-maturity Securities
Amortized Cost	3,841,000	3,850,000
Gross Unrealized Gains	448,000	91,000
Gross Unrealized Losses	(7,000)	(12,000)
Fair Value	4,282,000	3,929,000
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities
Amortized Cost	36,945,000	37,536,000
Gross Unrealized Gains	189,000	35,000
Gross Unrealized Losses	(394,000)	(3,041,000)
Fair Value	36,740,000	34,530,000
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities
Amortized Cost	7,682,000	7,836,000
Gross Unrealized Gains	9,000	2,000
Gross Unrealized Losses	(271,000)	(203,000)
Fair Value	$ 7,420,000	$ 7,635,000