Loans and Allowance for Loan Losses (Details 7) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Allowance for loan losses:
Provision for loan losses before benefit attributable to FDIC loss share agreements	$ 100,000	$ 13,697,000
Benefit attributable to FDIC loss share agreements	1,786,000	(78,000)
Total provision for loan losses charged to operations	1,886,000	13,619,000
Provision for loan losses recorded through the FDIC loss share receivable	(1,786,000)	78,000
Reduction due to loan removals	(4,682,000)	(6,901,000)
Balance at the end of the period	0
Credit impaired
Allowance for loan losses:
Balance at the beginning of the period	17,218,000	23,607,000
Provision for loan losses before benefit attributable to FDIC loss share agreements	(918,000)	512,000
Benefit attributable to FDIC loss share agreements	1,786,000	(78,000)
Total provision for loan losses charged to operations	868,000	434,000
Provision for loan losses recorded through the FDIC loss share receivable	(1,786,000)	78,000
Reduction due to loan removals	(4,682,000)	(6,901,000)
Balance at the end of the period	11,618,000	17,218,000
Loans collectively evaluated for impairment	11,618,000	17,218,000
Loans:
Loans collectively evaluated for impairment	1,227,698,000	986,613,000
Total acquired loans	1,227,698,000	986,613,000
Credit impaired | Commercial Loans Greater Than or Equal to $1 Million-CBT
Allowance for loan losses:
Balance at the beginning of the period	5,337,000	12,417,000
Provision for loan losses before benefit attributable to FDIC loss share agreements	(3,109,000)	(1,298,000)
Benefit attributable to FDIC loss share agreements	2,934,000	1,233,000
Total provision for loan losses charged to operations	(175,000)	(65,000)
Provision for loan losses recorded through the FDIC loss share receivable	(2,934,000)	(1,233,000)
Reduction due to loan removals	(1,925,000)	(5,782,000)
Balance at the end of the period	303,000	5,337,000
Loans collectively evaluated for impairment	303,000	5,337,000
Loans:
Loans collectively evaluated for impairment	24,109,000	39,661,000
Total acquired loans	24,109,000	39,661,000
Credit impaired | Commercial Real Estate
Allowance for loan losses:
Balance at the beginning of the period	1,517,000	1,318,000
Provision for loan losses before benefit attributable to FDIC loss share agreements	299,000	199,000
Benefit attributable to FDIC loss share agreements	(456,000)	(30,000)
Total provision for loan losses charged to operations	(157,000)	169,000
Provision for loan losses recorded through the FDIC loss share receivable	456,000	30,000
Balance at the end of the period	1,816,000	1,517,000
Loans collectively evaluated for impairment	1,816,000	1,517,000
Loans:
Loans collectively evaluated for impairment	439,785,000	372,924,000
Total acquired loans	439,785,000	372,924,000
Credit impaired | Commercial Real Estate - Construction and Development
Allowance for loan losses:
Balance at the beginning of the period	1,628,000
Provision for loan losses before benefit attributable to FDIC loss share agreements	2,347,000	1,628,000
Benefit attributable to FDIC loss share agreements	(1,645,000)	(1,319,000)
Total provision for loan losses charged to operations	702,000	309,000
Provision for loan losses recorded through the FDIC loss share receivable	1,645,000	1,319,000
Reduction due to loan removals	(1,731,000)
Balance at the end of the period	2,244,000	1,628,000
Loans collectively evaluated for impairment	2,244,000	1,628,000
Loans:
Loans collectively evaluated for impairment	114,126,000	130,451,000
Total acquired loans	114,126,000	130,451,000
Credit impaired | Residential Real Estate
Allowance for loan losses:
Balance at the beginning of the period	4,207,000	5,332,000
Provision for loan losses before benefit attributable to FDIC loss share agreements	1,057,000	(855,000)
Benefit attributable to FDIC loss share agreements	(520,000)	813,000
Total provision for loan losses charged to operations	537,000	(42,000)
Provision for loan losses recorded through the FDIC loss share receivable	520,000	(813,000)
Reduction due to loan removals	(132,000)	(270,000)
Balance at the end of the period	5,132,000	4,207,000
Loans collectively evaluated for impairment	5,132,000	4,207,000
Loans:
Loans collectively evaluated for impairment	476,689,000	354,718,000
Total acquired loans	476,689,000	354,718,000
Credit impaired | Consumer
Allowance for loan losses:
Balance at the beginning of the period	96,000
Provision for loan losses before benefit attributable to FDIC loss share agreements	442,000	96,000
Benefit attributable to FDIC loss share agreements	(412,000)	(88,000)
Total provision for loan losses charged to operations	30,000	8,000
Provision for loan losses recorded through the FDIC loss share receivable	412,000	88,000
Balance at the end of the period	538,000	96,000
Loans collectively evaluated for impairment	538,000	96,000
Loans:
Loans collectively evaluated for impairment	103,998,000	15,685,000
Total acquired loans	103,998,000	15,685,000
Credit impaired | Commercial & Industrial
Allowance for loan losses:
Balance at the beginning of the period	4,139,000	4,564,000
Provision for loan losses before benefit attributable to FDIC loss share agreements	(1,786,000)	(259,000)
Benefit attributable to FDIC loss share agreements	1,719,000	264,000
Total provision for loan losses charged to operations	(67,000)	5,000
Provision for loan losses recorded through the FDIC loss share receivable	(1,719,000)	(264,000)
Reduction due to loan removals	(872,000)	(166,000)
Balance at the end of the period	1,481,000	4,139,000
Loans collectively evaluated for impairment	1,481,000	4,139,000
Loans:
Loans collectively evaluated for impairment	68,862,000	72,718,000
Total acquired loans	68,862,000	72,718,000
Credit impaired | Single Pay
Allowance for loan losses:
Balance at the beginning of the period	294,000	(24,000)
Provision for loan losses before benefit attributable to FDIC loss share agreements	(168,000)	1,001,000
Benefit attributable to FDIC loss share agreements	166,000	(951,000)
Total provision for loan losses charged to operations	(2,000)	50,000
Provision for loan losses recorded through the FDIC loss share receivable	(166,000)	951,000
Reduction due to loan removals	(22,000)	(683,000)
Balance at the end of the period	104,000	294,000
Loans collectively evaluated for impairment	104,000	294,000
Loans:
Loans collectively evaluated for impairment	129,000	456,000
Total acquired loans	129,000	456,000
Acquired loans
Allowance for loan losses:
Balance at the end of the period	11,618,000	17,218,000
Loans:
Total acquired loans	$ 1,227,698,000	$ 986,613,000