Investment Securities, Amortized Cost, Estimated Values and Gross Unrealized Gains and Losses (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
INVESTMENT SECURITIES [Abstract]
Investment securities transferred from available for sale to held to maturity	$ 31,286,000	$ 0
Available for sale [Abstract]
Amortized Cost	363,198,000		407,211,000
Gross Unrealized Gains	9,590,000		9,339,000
Gross Unrealized Losses	(8,640,000)		(15,770,000)
Estimated Fair Value	364,148,000		400,780,000
Held to maturity [Abstract]
Amortized Cost	45,479,000		11,666,000
Gross Unrealized Gains	694,000		655,000
Gross Unrealized Losses	(165,000)		(87,000)
Estimated Fair Value	46,008,000		12,234,000
Total investment securities [Abstract]
Total Amortized Cost	408,677,000		418,877,000
Total Gross Unrealized Gains	10,284,000		9,994,000
Total Gross Unrealized Losses	(8,805,000)		(15,857,000)
Total Fair Value	410,156,000		413,014,000
Investment securities pledged	255,000,000		292,000,000
U.S. Government Agency Securities [Member]
Held to maturity [Abstract]
Amortized Cost	31,318,000		0
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(165,000)		0
Estimated Fair Value	31,153,000		0
Obligations of States and Political Subdivisions [Member]
Held to maturity [Abstract]
Amortized Cost	14,161,000		11,666,000
Gross Unrealized Gains	694,000		655,000
Gross Unrealized Losses	0		(87,000)
Estimated Fair Value	14,855,000		12,234,000
U.S. Government Agency Securities [Member]
Available for sale [Abstract]
Amortized Cost	70,466,000		109,315,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(3,705,000)		(9,220,000)
Estimated Fair Value	66,761,000		100,095,000
Obligations of States and Political Subdivisions [Member]
Available for sale [Abstract]
Amortized Cost	147,472,000		148,664,000
Gross Unrealized Gains	8,451,000		8,499,000
Gross Unrealized Losses	0		0
Estimated Fair Value	155,923,000		157,163,000
Collateralized Mortgage Obligations [Member]
Available for sale [Abstract]
Amortized Cost	27,108,000		30,335,000
Gross Unrealized Gains	880,000		557,000
Gross Unrealized Losses	(689,000)		(788,000)
Estimated Fair Value	27,299,000		30,104,000
Mortgage-Backed Securities [Member]
Available for sale [Abstract]
Amortized Cost	102,591,000		103,332,000
Gross Unrealized Gains	18,000		19,000
Gross Unrealized Losses	(4,128,000)		(5,584,000)
Estimated Fair Value	98,481,000		97,767,000
Corporate Bonds [Member]
Available for sale [Abstract]
Amortized Cost	15,561,000		15,565,000
Gross Unrealized Gains	241,000		264,000
Gross Unrealized Losses	(118,000)		(178,000)
Estimated Fair Value	$ 15,684,000		$ 15,651,000