Capital Ratios (Details)	Mar. 31, 2014	Dec. 31, 2013
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Risk-Based Capital Ratio	14.75%	14.96%
Total Risk-Based Capital Ratio, Minimum Capital Requirement	8.00%
Tier 1 Risk-Based Capital Ratio	13.50%	13.71%
Tier 1 Risk-Based Capital Ratio, Minimum Capital Requirement	4.00%
Leverage Ratio	11.65%	11.49%
Leverage Ratio, Minimum Capital Requirement	4.00%
Guaranty Bank And Trust Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Risk-Based Capital Ratio	14.24%	14.37%
Total Risk-Based Capital Ratio, Minimum Capital Requirement	8.00%
Total Risk-Based Capital Ratio, Minimum Requirement for "Well Capitalized" Institution	10.00%
Tier 1 Risk-Based Capital Ratio	12.99%	13.12%
Tier 1 Risk-Based Capital Ratio, Minimum Capital Requirement	4.00%
Tier 1 Risk-Based Capital Ratio, Minimum Requirement for "Well Capitalized" Institution	6.00%
Leverage Ratio	11.22%	11.00%
Leverage Ratio, Minimum Capital Requirement	4.00%
Leverage Ratio, Minimum Requirement for "Well Capitalized" Institution	5.00%

The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

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