Investment Securities (Held-to-maturity Securities) (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 48,803,000	$ 49,222,000
Gross Unrealized Gains	250,000	128,000
Gross Unrealized Losses	(1,454,000)	(3,256,000)
Fair Value	47,599,000	46,094,000
Gross realized gains or losses	0	0
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	3,848,000	3,850,000
Gross Unrealized Gains	200,000	91,000
Gross Unrealized Losses	(11,000)	(12,000)
Fair Value	4,037,000	3,929,000
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	37,151,000	37,536,000
Gross Unrealized Gains	50,000	35,000
Gross Unrealized Losses	(1,171,000)	(3,041,000)
Fair Value	36,030,000	34,530,000
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	7,804,000	7,836,000
Gross Unrealized Gains	0	2,000
Gross Unrealized Losses	(272,000)	(203,000)
Fair Value	$ 7,532,000	$ 7,635,000