EMPLOYEE BENEFITS	9 Months Ended
Sep. 30, 2018
Retirement Benefits [Abstract]
EMPLOYEE BENEFITS	EMPLOYEE BENEFITS KSOP The Company maintains an Employee Stock Ownership Plan containing Section 401(k) provisions covering substantially all employees (“KSOP”). The plan provides for a matching contribution of up to 5% of a participant’s qualified compensation starting January 1, 2016. At December 31, 2016, the plan included a repurchase obligation, or “put option”, which is a right to demand that the sponsor repurchase shares of employer stock distributed to the participant under the terms of the plan, for which there was no public market for such shares, at an established cash price. This put option was terminated upon completion of Guaranty’s initial public offering and listing of its common stock on the NASDAQ Global Select Market in May 2017. Guaranty’s total contributions accrued or paid during the nine months ended September 30, 2018 and 2017 totaled $856 and $739, respectively. Upon separation from service or other distributable event, a participant’s account under the KSOP may be distributed in kind in the form of the GNTY common shares allocated to his or her account (with the balance payable in cash), or the entire account can be liquidated and distributed in cash. As of December 31, 2016, the fair value of common stock, held by the KSOP, was deducted from permanent shareholders’ equity in the consolidated statement of changes in shareholders equity, and reflected in a column between accumulated other comprehensive income and total shareholders’ equity. This presentation was necessary in order to recognize the put option within the KSOP-owned shares, consistent with SEC guidelines, because the Company was not yet publicly traded. The Company used a valuation by an external third party to determine the maximum possible cash obligation related to those securities. Increases or decreases in the value of the cash obligation were included in a separate line item in the consolidated statements of changes in shareholders’ equity. As described above, the put option was terminated upon completion of our initial public offering and the prior value of $34,300 is shown as “Terminated KSOP put option” in the consolidated statement of changes in shareholders’ equity for the nine months ended September 30, 2017. As of September 30, 2018 and December 31, 2017, the number of shares held by the KSOP were 1,320,876 and 1,314,277, respectively. There were no unallocated shares to plan participants as of September 30, 2018 or as of December 31, 2017. During the nine months ended September 30, 2017, the Company did not repurchase any shares from KSOP participants that received distributions of shares from the KSOP which were subject to the put option that applied to the KSOP shares before we were publicly traded. All shares held by the KSOP were treated as outstanding at each of the respective period ends. Executive Incentive Retirement Plan The Company established a non-qualified, non-contributory executive incentive retirement plan covering a selected group of key personnel to provide benefits equal to amounts computed under an “award criteria” at various targeted salary levels as adjusted for annual earnings performance of the Company. The plan is non-funded. In connection with the Executive Incentive Retirement Plan, the Company has purchased life insurance policies on the respective officers. The cash surrender value of life insurance policies held by the Company totaled $25,747 and $19,117 as of September 30, 2018 and December 31, 2017, respectively. Expense related to these plans totaled $419 and $381 for the nine months ended September 30, 2018 and 2017, respectively, and is included in employee compensation and benefits on the Company’s consolidated statements of earnings. The recorded liability totaled approximately $3,678 and $2,420 as of September 30, 2018 and December 31, 2017, respectively and is included in accrued interest and other liabilities on the Company’s consolidated balance sheets. Bonus Plan The Company has a bonus plan that rewards officers and employees based on performance of individual business units of the Company. Earnings and growth performance goals for each business unit and for the Company as a whole are established at the beginning of the calendar year and approved annually by Guaranty’s board of directors. The Bonus Plan provides for a predetermined bonus amount to be contributed to the employee bonus pool based on (i) earnings target and growth for individual business units and (ii) achieving certain pre-tax return on average equity and pre-tax return on average asset levels for the Company as a whole. These bonus amounts are established annually by Guaranty’s board of directors. The bonus expense under this plan for the nine months ended September 30, 2018 and 2017 totaled $2,170 and $1,718, respectively and is included in employee compensation and benefits on the consolidated statements of earnings.

EMPLOYEE BENEFITS

KSOP

The Company maintains an Employee Stock Ownership Plan containing Section 401(k) provisions covering substantially all employees (“KSOP”). The plan provides for a matching contribution of up to 5% of a participant’s qualified compensation starting January 1, 2016. At December 31, 2016, the plan included a repurchase obligation, or “put option”, which is a right to demand that the sponsor repurchase shares of employer stock distributed to the participant under the terms of the plan, for which there was no public market for such shares, at an established cash price. This put option was terminated upon completion of Guaranty’s initial public offering and listing of its common stock on the NASDAQ Global Select Market in May 2017. Guaranty’s total contributions accrued or paid during the nine months ended September 30, 2018 and 2017 totaled $856 and $739, respectively.

Upon separation from service or other distributable event, a participant’s account under the KSOP may be distributed in kind in the form of the GNTY common shares allocated to his or her account (with the balance payable in cash), or the entire account can be liquidated and distributed in cash.

As of December 31, 2016, the fair value of common stock, held by the KSOP, was deducted from permanent shareholders’ equity in the consolidated statement of changes in shareholders equity, and reflected in a column between accumulated other comprehensive income and total shareholders’ equity. This presentation was necessary in order to recognize the put option within the KSOP-owned shares, consistent with SEC guidelines, because the Company was not yet publicly traded. The Company used a valuation by an external third party to determine the maximum possible cash obligation related to those securities. Increases or decreases in the value of the cash obligation were included in a separate line item in the consolidated statements of changes in shareholders’ equity. As described above, the put option was terminated upon completion of our initial public offering and the prior value of $34,300 is shown as “Terminated KSOP put option” in the consolidated statement of changes in shareholders’ equity for the nine months ended September 30, 2017.

As of September 30, 2018 and December 31, 2017, the number of shares held by the KSOP were 1,320,876 and 1,314,277, respectively. There were no unallocated shares to plan participants as of September 30, 2018 or as of December 31, 2017. During the nine months ended September 30, 2017, the Company did not repurchase any shares from KSOP participants that received distributions of shares from the KSOP which were subject to the put option that applied to the KSOP shares before we were publicly traded. All shares held by the KSOP were treated as outstanding at each of the respective period ends.

Executive Incentive Retirement Plan

The Company established a non-qualified, non-contributory executive incentive retirement plan covering a selected group of key personnel to provide benefits equal to amounts computed under an “award criteria” at various targeted salary levels as adjusted for annual earnings performance of the Company. The plan is non-funded.

In connection with the Executive Incentive Retirement Plan, the Company has purchased life insurance policies on the respective officers. The cash surrender value of life insurance policies held by the Company totaled $25,747 and $19,117 as of September 30, 2018 and December 31, 2017, respectively.

Expense related to these plans totaled $419 and $381 for the nine months ended September 30, 2018 and 2017, respectively, and is included in employee compensation and benefits on the Company’s consolidated statements of earnings. The recorded liability totaled approximately $3,678 and $2,420 as of September 30, 2018 and December 31, 2017, respectively and is included in accrued interest and other liabilities on the Company’s consolidated balance sheets.

Bonus Plan

The Company has a bonus plan that rewards officers and employees based on performance of individual business units of the Company. Earnings and growth performance goals for each business unit and for the Company as a whole are established at the beginning of the calendar year and approved annually by Guaranty’s board of directors. The Bonus Plan provides for a predetermined bonus amount to be contributed to the employee bonus pool based on (i) earnings target and growth for individual business units and (ii) achieving certain pre-tax return on average equity and pre-tax return on average asset levels for the Company as a whole. These bonus amounts are established annually by Guaranty’s board of directors. The bonus expense under this plan for the nine months ended September 30, 2018 and 2017 totaled $2,170 and $1,718, respectively and is included in employee compensation and benefits on the consolidated statements of earnings.