Segment Reporting (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Segment Reporting [Abstract]
Number of primary business segment	2		2
Reportable segments and reconciliation to consolidated results [Abstract]
Net interest income	$ 11,775,075	$ 11,843,549	$ 35,155,567	$ 31,840,821
Provision for loan losses	225,000	583,333	753,897	833,333	958,333
Net interest income after provision for loan losses	11,550,075	11,260,216	34,401,670	31,007,488
Other operating income	4,060,221	4,328,463	13,087,701	13,420,012
Other operating expenses	11,393,000	10,617,388	34,199,674	33,261,986
Income or (loss) before income tax expense	4,217,296	4,971,291	13,289,697	11,165,514
Income tax expense (benefit)	1,383,451	1,680,351	4,397,279	3,589,455
Segment net income (loss)	2,833,845	3,290,940	8,892,418	7,576,059
Segment assets	1,286,979,857	1,265,924,000	1,286,979,857	1,265,924,000	1,216,259,587
Core Banking [Member]
Reportable segments and reconciliation to consolidated results [Abstract]
Net interest income	11,774,000	11,842,000	35,149,000	31,834,000
Provision for loan losses	225,000	583,000	754,000	833
Net interest income after provision for loan losses	11,549,000	11,259	34,395,000	31,001,000
Other operating income	2,180,000	2,465	7,396	7,284,000
Other operating expenses	9,510,000	8,638,000	28,344	27,259,000
Income or (loss) before income tax expense	4,219,000	5,086,000	13,447,000	11,026,000
Income tax expense (benefit)	1,400,000	1,742,000	4,512,000	3,589,000
Segment net income (loss)	2,819,000	3,344,000	8,935,000	7,437,000
Segment assets	1,279,107,000	1,257,067,000	1,279,107,000	1,257,067,000
Wealth Management Group Services [Member]
Reportable segments and reconciliation to consolidated results [Abstract]
Net interest income	0	0	0	0
Provision for loan losses	0	0	0	0
Net interest income after provision for loan losses	0	0	0	0
Other operating income	1,668,000	1,747	5,170	5,131,000
Other operating expenses	1,708,000	1,843,000	5,279,000	5,450,000
Income or (loss) before income tax expense	(40,000)	(96,000)	(109,000)	(319,000)
Income tax expense (benefit)	(15,000)	(37,000)	(42,000)	(123,000)
Segment net income (loss)	(25,000)	(59,000)	(67,000)	(196,000)
Segment assets	5,249,000	5,856,000	5,249,000	5,856,000
Holding Company and Other [Member]
Reportable segments and reconciliation to consolidated results [Abstract]
Net interest income	1,000	1,000	7,000	6,000
Provision for loan losses	0	0	0	0
Net interest income after provision for loan losses	1	1,000	7,000	6,000
Other operating income	212,000	116,000	522,000	1,005,000
Other operating expenses	175,000	136,000	577,000	553,000
Income or (loss) before income tax expense	38,000	(19,000)	(48,000)	458,000
Income tax expense (benefit)	(2,000)	(25,000)	(72,000)	123,000
Segment net income (loss)	40,000	6,000	24,000	335,000
Segment assets	$ 2,624,000	$ 3,001,000	$ 2,624,000	$ 3,001,000