Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended		6 Months Ended				6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 MidCarolina [Member]	Jul. 01, 2011 MidCarolina [Member]	Jun. 30, 2013 Community First [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Core deposit intangible					$ 6,556,000	$ 6,556,000	$ 3,112,000
Amortization period of intangible			9 years		108 months		99 months
Changes in the carrying amount of goodwill [Roll Forward]
Goodwill, beginning of period			39,043,000			16,575,000
Goodwill, Additions			0
Goodwill, Amortization			0
Goodwill, Impairment			0
Goodwill, end of period	39,043,000		39,043,000			16,575,000
Finite-lived Intangible Assets [Roll Forward]
Intangibles, Beginning Balance			4,660,000
Intangibles, Additions			0
Intangibles, Amortization	(421,000)	(546,000)	(841,000)	(1,093,000)
Intangibles, Impairment			0
Intangibles, Ending Balance	$ 3,819,000		$ 3,819,000