Note 10. Regulatory Capital Requirements (Detail) - Regulatory Capital Requirements (USD $)	Jun. 30, 2012	Dec. 31, 2011
Tri City Bankshares Corporation [Member]
Total capital (to risk weighed assets)
Amount (in Dollars)	$ 133,732,000	$ 130,371,000
Ratio	17.80%	17.10%
Amount (in Dollars)	59,986,000	61,037,000
Ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets)
Amount (in Dollars)	124,344,000	120,816,000
Ratio	16.60%	15.80%
Amount (in Dollars)	29,990,000	30,414,000
Ratio	4.00%	4.00%
Total capital (to average assets)
Amount (in Dollars)	124,344,000	120,816,000
Ratio	10.70%	10.60%
Amount (in Dollars)	46,643,000	45,524,000
Ratio	4.00%	4.00%
Tri City National Bank [Member]
Total capital (to risk weighed assets)
Amount (in Dollars)	129,356,000	125,937,000
Ratio	17.30%	16.60%
Amount (in Dollars)	59,910,000	60,783,000
Ratio	8.00%	8.00%
Amount (in Dollars)	74,887,000	75,979,000
Ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets)
Amount (in Dollars)	119,968,000	116,421,000
Ratio	16.00%	15.50%
Amount (in Dollars)	29,955,000	30,392,000
Ratio	4.00%	4.00%
Amount (in Dollars)	44,932,000	45,588,000
Ratio	6.00%	6.00%
Total capital (to average assets)
Amount (in Dollars)	119,968,000	116,421,000
Ratio	10.30%	10.20%
Amount (in Dollars)	46,693,000	45,515,000
Ratio	4.00%	4.00%
Amount (in Dollars)	$ 58,366,000	$ 56,894,000
Ratio	5.00%	5.00%