Segment Reporting (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 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	$ 11,364,620	$ 11,451,083	$ 23,380,493	$ 19,997,272
Provision for loan losses	51,593	125,000	528,897	250,000	958,333
Net interest income after provision for loan losses	11,313,027	11,326,083	22,851,596	19,747,272
Other operating income	4,130,623	4,744,057	9,027,480	9,091,550
Other operating expenses	11,884,328	12,200,960	22,806,675	22,644,598
Income or (loss) before income tax expense	3,559,322	3,869,180	9,072,401	6,194,224
Income tax expense (benefit)	1,115,282	1,249,076	3,013,828	1,909,105
Segment net income (loss)	2,444,040	2,620,104	6,058,573	4,285,119
Segment assets	1,267,459,097	1,237,036,123	1,267,459,097	1,237,036,123	1,216,259,587
Core Banking [Member]
Reportable segments and reconciliation to consolidated results [Abstract]
Net interest income	11,363,000	11,448,000	23,376,000	19,992,000
Provision for loan losses	52,000	125,000	529,000	250,000
Net interest income after provision for loan losses	11,311,000	11,323,000	22,847,000	19,742,000
Other operating income	2,139,000	2,732,000	5,216,000	4,819,000
Other operating expenses	9,903,000	10,215,000	18,834,000	18,620,000
Income or (loss) before income tax expense	3,547,000	3,840,000	9,229,000	5,941,000
Income tax expense (benefit)	1,127,000	1,255,000	3,110,000	1,846,000
Segment net income (loss)	2,420,000	2,585,000	6,119,000	4,095,000
Segment assets	1,259,532,000	1,228,705,000	1,259,532,000	1,228,705,000
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	1,727,000	1,768,000	3,502,000	3,384,000
Other operating expenses	1,762,000	1,791,000	3,571,000	3,607,000
Income or (loss) before income tax expense	(35,000)	(23,000)	(69,000)	(223,000)
Income tax expense (benefit)	(14,000)	(9,000)	(26,000)	(86,000)
Segment net income (loss)	(21,000)	(14,000)	(43,000)	(137,000)
Segment assets	5,356,000	6,020,000	5,356,000	6,020,000
Holding Company and Other [Member]
Reportable segments and reconciliation to consolidated results [Abstract]
Net interest income	2,000	3,000	5,000	5,000
Provision for loan losses	0	0	0	0
Net interest income after provision for loan losses	2,000	3,000	5,000	5,000
Other operating income	264,000	244,000	309,000	888,000
Other operating expenses	219,000	195,000	402,000	417,000
Income or (loss) before income tax expense	47,000	52,000	(88,000)	476,000
Income tax expense (benefit)	2,000	3,000	(70,000)	149,000
Segment net income (loss)	45,000	49,000	(18,000)	327,000
Segment assets	$ 2,571,000	$ 2,311,000	$ 2,571,000	$ 2,311,000