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Investments - Textual (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Schedule of Available-for-sale Securities
Available-for-sale Securities Pledged as Collateral	$ 102,764,000		$ 102,764,000
Available-for-sale Securities, Gross Unrealized Gain (Loss)	(2,234,000)		(2,234,000)		12,891,000
Income tax impact from the reclassification of unrealized net gains on available-for-sale securities to realized net gains on available-for-sale securities	132,000	40,000	466,000	183,000
Available-for-sale Securities, Gross Unrealized Losses	8,559,000		8,559,000		1,721,000
Gross Unrealized Gains	6,325,000		6,325,000		14,612,000
U.S. Government agencies
Schedule of Available-for-sale Securities
Available-for-sale Securities, Number of Positions	5		5
Debt Securities, Amortized Cost	14,621,000		14,621,000		9,443,000
Available-for-sale Securities, Gross Unrealized Losses	3,000		3,000		23,000
Gross Unrealized Gains	235,000		235,000		34,000
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities
Available-for-sale Securities, Number of Positions	199		199
Debt Securities, Amortized Cost	170,005,000		170,005,000		151,312,000
Available-for-sale Securities, Gross Unrealized Losses	6,476,000		6,476,000		385,000
Gross Unrealized Gains	4,362,000		4,362,000		10,751,000
U.S. Government agencies collateralized by residential mortgage obligations
Schedule of Available-for-sale Securities
Available-for-sale Securities, Number of Positions	182		182
Debt Securities, Amortized Cost	179,620,000		179,620,000		206,465,000
Available-for-sale Securities, Gross Unrealized Losses	2,076,000		2,076,000		1,107,000
Gross Unrealized Gains	828,000		828,000		3,152,000
Private label residential mortgage backed securities
Schedule of Available-for-sale Securities
Available-for-sale Securities, Gross Unrealized Gain (Loss)	855,000		855,000
Available-for-sale Securities, Number of Positions	22		22
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	1		1
Debt Securities, Amortized Cost	5,232,000		5,232,000		6,258,000
Available-for-sale Securities, Gross Unrealized Losses	4,000		4,000		206,000
Available-for-sale, Securities in Unrealized Gain Positions, Number of Positions	21		21
Gross Unrealized Gains	859,000		859,000		323,000
Other equity securities
Schedule of Available-for-sale Securities
Available-for-sale Securities, Gross Unrealized Losses	0		0		0
Gross Unrealized Gains	41,000		41,000		352,000
Less than 12 months | U.S. Government agencies
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	1		1
Less than 12 months | Obligations of states and political subdivisions
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	72		72
Less than 12 months | U.S. Government agencies collateralized by residential mortgage obligations
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	58		58
Greater than 12 months | U.S. Government agencies
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	0		0
Greater than 12 months | Obligations of states and political subdivisions
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	0		0
Greater than 12 months | U.S. Government agencies collateralized by residential mortgage obligations
Schedule of Available-for-sale Securities
Available-for-sale, Securities in Unrealized Loss Positions, Number of Positions	19		19
Below investment grade | Private label residential mortgage backed securities
Schedule of Available-for-sale Securities
Available-for-sale Securities, Gross Unrealized Gain (Loss)	738,000		738,000
Available-for-sale Securities, Number of Positions	8		8
Debt Securities, Amortized Cost	$ 4,068,000		$ 4,068,000

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