Loans and Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	$ 8,924	$ 9,895
Impaired loans without a valuation allowance, Unpaid Principal Balance	9,501	10,060
Impaired loans without a valuation allowance, Average Recorded Investment	9,411	9,541
Impaired loans without a valuation allowance, Interest Income Recognized	116	519
Impaired loans with a valuation allowance, Recorded Investment	1,553	3,895
Impaired loans with a valuation allowance, Unpaid Principal Balance	1,573	3,996
Impaired loans with a valuation allowance, Related Allowance	438	564
Impaired loans with a valuation allowance, Average Recorded Investment	2,725	6,996
Impaired loans with a valuation allowance, Interest Income Recognized	35	261
Total impaired loans, Recorded Investment	10,477	13,790
Total impaired loans, Unpaid Principal Balance	11,074	14,056
Total impaired loans, Related Allowance	438	564
Total impaired loans, Average Recorded Investment	12,136	16,537
Total impaired loans, Interest Income Recognized	151	780
Commercial Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	5,180	5,786
Impaired loans without a valuation allowance, Unpaid Principal Balance	5,670	5,854
Impaired loans without a valuation allowance, Average Recorded Investment	5,483	4,657
Impaired loans without a valuation allowance, Interest Income Recognized	74	340
Impaired loans with a valuation allowance, Recorded Investment	137	2,196
Impaired loans with a valuation allowance, Unpaid Principal Balance	147	2,285
Impaired loans with a valuation allowance, Related Allowance	70	498
Impaired loans with a valuation allowance, Average Recorded Investment	1,167	4,869
Impaired loans with a valuation allowance, Interest Income Recognized	5	118
Consumer Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	2,021	2,177
Impaired loans without a valuation allowance, Unpaid Principal Balance	2,035	2,202
Impaired loans without a valuation allowance, Average Recorded Investment	2,100	2,669
Impaired loans without a valuation allowance, Interest Income Recognized	24	96
Impaired loans with a valuation allowance, Recorded Investment	1,034	1,270
Impaired loans with a valuation allowance, Unpaid Principal Balance	1,044	1,281
Impaired loans with a valuation allowance, Related Allowance	266	11
Impaired loans with a valuation allowance, Average Recorded Investment	1,152	1,353
Impaired loans with a valuation allowance, Interest Income Recognized	19	90
Construction and Land Development [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	366	369
Impaired loans without a valuation allowance, Unpaid Principal Balance	379	383
Impaired loans without a valuation allowance, Average Recorded Investment	368	358
Impaired loans without a valuation allowance, Interest Income Recognized	5	23
Impaired loans with a valuation allowance, Recorded Investment	0	0
Impaired loans with a valuation allowance, Unpaid Principal Balance	0	0
Impaired loans with a valuation allowance, Related Allowance	0	0
Impaired loans with a valuation allowance, Average Recorded Investment	0	177
Impaired loans with a valuation allowance, Interest Income Recognized	0	0
Commercial and Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	1,357	1,563
Impaired loans without a valuation allowance, Unpaid Principal Balance	1,417	1,621
Impaired loans without a valuation allowance, Average Recorded Investment	1,460	1,857
Impaired loans without a valuation allowance, Interest Income Recognized	13	60
Impaired loans with a valuation allowance, Recorded Investment	382	429
Impaired loans with a valuation allowance, Unpaid Principal Balance	382	430
Impaired loans with a valuation allowance, Related Allowance	102	55
Impaired loans with a valuation allowance, Average Recorded Investment	406	597
Impaired loans with a valuation allowance, Interest Income Recognized	$ 11	$ 53