Securities (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 Segment	Sep. 30, 2012	Dec. 31, 2012 Segment
Amortized cost and fair value of securities held-to-maturity [Abstract]
Amortized Cost	$ 93,819,000
Gross Unrealized Gains	1,740,000
Gross Unrealized Losses	(721,000)
Fair Value	94,838,000
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	166,091,000		326,436,000
Gross Unrealized Gains	326,000		3,992,000
Gross Unrealized Losses	(8,270,000)		(972,000)
Fair Value	158,147,000		329,456,000
Securities transferred from available-for-sale to held-to-maturity	68,015,458	0
Unrealized Gain or Loss on AFS to HTM Transfers	(6,231,880)	0
Securities transferred from available-for-sale to held-to-maturity, amortized cost	74,247,338
Amortization of Unrealized Gain or Loss on Securities Transferred from AFS to HTM	68,166	0
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	7,516,000		972,000
More Than Twelve Months	754,000		0
Total	8,270,000		972,000
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	130,802,000		119,404,000
More Than Twelve Months	11,324,000		0
Total	142,126,000		119,404,000
Securities Held-to-Maturity, Gross Unrealized Loss [Abstract]
Less Than Twelve Months	721,000
More Than Twelve Months	0
Total	721,000
Securities Held-to-Maturity, Fair Value [Abstract]
Less than Twelve Months	20,730,000
More Than Twelve Months	0
Total	20,730,000
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Cause	caused by increases in market interest rates.
Number of Securities	106		36
Held-to-maturity securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities	43
Obligations of U.S. Government agencies [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	15,193,000		35,787,000
Gross Unrealized Gains	249,000		1,314,000
Gross Unrealized Losses	(378,000)		(13,000)
Fair Value	15,064,000		37,088,000
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	378,000		13,000
More Than Twelve Months	0		0
Total	378,000		13,000
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	4,454,000		5,103,000
More Than Twelve Months	0		0
Total	4,454,000		5,103,000
Securities Held-to-Maturity, Gross Unrealized Loss [Abstract]
Less Than Twelve Months	5,000
More Than Twelve Months	0
Total	5,000
Securities Held-to-Maturity, Fair Value [Abstract]
Less than Twelve Months	95,000
More Than Twelve Months	0
Total	95,000
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities	1		1
Held-to-maturity securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities	1
Obligations of states and political subdivisions [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	51,362,000		43,276,000
Gross Unrealized Gains	77,000		712,000
Gross Unrealized Losses	(4,389,000)		(214,000)
Fair Value	47,050,000		43,774,000
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	4,251,000		214,000
More Than Twelve Months	138,000		0
Total	4,389,000		214,000
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	40,686,000		9,535,000
More Than Twelve Months	1,944,000		0
Total	42,630,000		9,535,000
Securities Held-to-Maturity, Gross Unrealized Loss [Abstract]
Less Than Twelve Months	716,000
More Than Twelve Months	0
Total	716,000
Securities Held-to-Maturity, Fair Value [Abstract]
Less than Twelve Months	20,635,000
More Than Twelve Months	0
Total	20,635,000
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities	83		24
Held-to-maturity securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities	42
Mortgage-backed securities [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	97,245,000		246,132,000
Gross Unrealized Gains	0		1,966,000
Gross Unrealized Losses	(3,477,000)		(743,000)
Fair Value	93,768,000		247,355,000
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	2,863,000		743,000
More Than Twelve Months	614,000		0
Total	3,477,000		743,000
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	84,487,000		104,066,000
More Than Twelve Months	9,282,000		0
Total	93,769,000		104,066,000
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities	12		9
Money market investments [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	892,000		541,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	0		0
Fair Value	892,000		541,000
Corporate bond and other securities [Member]
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	24,000		2,000
More Than Twelve Months	2,000		0
Total	26,000		2,000
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	1,175,000		700,000
More Than Twelve Months	98,000		0
Total	1,273,000		700,000
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]
Number of Securities	10		2
Corporate Bonds [Member]
Amortized cost and fair value of securities available-for-sale [Abstract]
Amortized Cost	1,399,000		700,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(26,000)		(2,000)
Fair Value	1,373,000		698,000
Obligations of U.S. Government agencies [Member]
Amortized cost and fair value of securities held-to-maturity [Abstract]
Amortized Cost	570,000		570,000
Gross Unrealized Gains	2,000		4,000
Gross Unrealized Losses	(5,000)		0
Fair Value	567,000		574,000
Obligations of states and political subdivisions [Member]
Amortized cost and fair value of securities held-to-maturity [Abstract]
Amortized Cost	25,669,000
Gross Unrealized Gains	3,000
Gross Unrealized Losses	(716,000)
Fair Value	24,956,000
Collateralized Mortgage Backed Securities [Member]
Amortized cost and fair value of securities held-to-maturity [Abstract]
Amortized Cost	67,580,000
Gross Unrealized Gains	1,735,000
Gross Unrealized Losses	0
Fair Value	$ 69,315,000