Employee Benefit Plans	12 Months Ended
Dec. 31, 2022
Retirement Benefits [Abstract]
Employee Benefit Plans	14. EMPLOYEE BENEFIT PLANS: The Company also provides a 401(k) plan and profit sharing plan, a qualified defined contribution plan, which covers substantially all full-time employees. The 401(k) feature allows employees to contribute a percentage of their base annual salary with a corresponding employer match. The profit sharing feature includes an employee stock ownership feature (“ESOP”). Employees are fully vested to the extent of their contributions and become fully vested in the Company’s profit sharing contributions over a six-year vesting period. The Company matches a maximum of 4% on employee deferrals of 5% of their employee compensation. Total expense for this match in 2022, 2021 and 2020 was $3,675,000, $3,590,000 and $3,374,000, respectively, and is included in salaries and employee benefits in the statements of earnings. Costs related to the Company’s profit sharing plan totaled approximately $4,233,000, $10,134,000 and $10,740,000 in 2022, 2021 and 2020, respectively, and are included in salaries and employee benefits in the accompanying consolidated statements of earnings. As of December 31, 2022 and 2021, the profit sharing plan’s ESOP assets included First Financial Bankshares, Inc. common stock of 2,148,460 and 2,183,760 shares valued at approximately $73,907,000 and $111,022,000, respectively. The Company has a non-qualified “excess benefit” plan where executives, whose Company contributions to the profit sharing plan and employer match under the 401(k) feature are curtailed due to Internal Revenue Service limitations, received contributions from the Company equal to the amount under qualified plans as if there had been no Internal Revenue Service limitations. This plan used the same contribution formula and vesting requirements as the 401(k) and profit sharing plan. This "Make Whole Plan" was frozen to new participants and contributions effective December 31, 2018. As of December 31, 2022 and 2021, the Make Whole Plan held 114,177 and 116,085 shares, respectively, in trust for the Company’s executives. There were no contributions to this plan during the years ended December 31, 2022, 2021 and 2020. The Company adopted a Supplemental Executive Retirement Plan (“SERP”), effective January 1, 2019, which was amended effective January 1, 2022. The SERP benefits certain key senior executives of the Company who are selected by the Board to participate. The SERP is intended to provide a benefit from the Company upon retirement, death, disability or voluntary or involuntary termination of services (other than “for cause”). Under the SERP, the Company may, but is not required to, make discretionary contributions to the executive’s accounts from time to time. The contributions may be fully vested or subject to vesting conditions imposed by the Board of Directors with respect to the contributions; provided, however, that all unvested amounts credited to an executive’s account will become fully vested upon the executive’s death or disability or upon the occurrence of a change of control (as defined in the SERP). Company contributions to the SERP on behalf of an executive are credited with earnings and losses based on the executive’s investment elections. The investment options under the SERP are currently the same as those offered under the Company’s profit sharing plan, except that Company stock is not an available investment option under the SERP. An executive’s vested account is payable to the participant following his or her termination in a single lump sum or installments, as elected by the participant. The SERP as amended allows selected participants to defer base and incentive compensation as well as the receipt of shares from vested restricted and performance stock units into the plan. At December 31, 2022 and 2021, other assets on the consolidated balance sheet include $2,172,000 and $1,211,000 of SERP balances, respectively. The Company made contributions totaling $445,000, $1,163,000 and $719,000 to the SERP for the years ended December 31, 2022, 2021 and 2020, subsequent to the respective year ends, for certain executive officers. The Company has a directors’ deferred compensation plan whereby the directors may elect to defer up to 100% of their directors’ fees. All deferred compensation is invested in the Company’s common stock held in a rabbi trust wherein the funds are used to purchase Company common shares on the open market. The stock is held in nominee name of the trustee, and the principal and earnings of the trust are held separate and apart from other funds of the Company and are used exclusively for the uses and purposes of the deferred compensation agreement. The accounts of the trust have been consolidated in the financial statements of the Company. As of December 31, 2022 and 2021, the rabbi trust held 929,210 and 936,897 shares, respectively, in trust for the Company’s directors and are reflected as treasury shares on the consolidated financial statements. The Company has acquired life insurance policies on certain current and former executives and directors of acquired entities. At December 31, 2022 and 2021, other assets on the consolidated balance sheet include $33,241,000 and $32,404,000 and reported cash value income (net of related insurance premium expenses) of $836,000, $814,000 and $822,000 in 2022, 2021 and 2020, respectively.

Employee Benefit Plans

12 Months Ended

Dec. 31, 2022

14. EMPLOYEE BENEFIT PLANS:

The Company also provides a 401(k) plan and profit sharing plan, a qualified defined contribution plan, which covers substantially all full-time employees. The 401(k) feature allows employees to contribute a percentage of their base annual salary with a corresponding employer match. The profit sharing feature includes an employee stock ownership feature (“ESOP”). Employees are fully vested to the extent of their contributions and become fully vested in the Company’s profit sharing contributions over a six-year vesting period.

The Company matches a maximum of 4% on employee deferrals of 5% of their employee compensation. Total expense for this match in 2022, 2021 and 2020 was $3,675,000, $3,590,000 and $3,374,000, respectively, and is included in salaries and employee benefits in the statements of earnings.

Costs related to the Company’s profit sharing plan totaled approximately $4,233,000, $10,134,000 and $10,740,000 in 2022, 2021 and 2020, respectively, and are included in salaries and employee benefits in the accompanying consolidated statements of earnings. As of December 31, 2022 and 2021, the profit sharing plan’s ESOP assets included First Financial Bankshares, Inc. common stock of 2,148,460 and 2,183,760 shares valued at approximately $73,907,000 and $111,022,000, respectively.

The Company has a non-qualified “excess benefit” plan where executives, whose Company contributions to the profit sharing plan and employer match under the 401(k) feature are curtailed due to Internal Revenue Service limitations, received contributions from the Company equal to the amount under qualified plans as if there had been no Internal Revenue Service limitations. This plan used the same contribution formula and vesting requirements as the 401(k) and profit sharing plan. This "Make Whole Plan" was frozen to new participants and contributions effective December 31, 2018. As of December 31, 2022 and 2021, the Make Whole Plan held 114,177 and 116,085 shares, respectively, in trust for the Company’s executives. There were no contributions to this plan during the years ended December 31, 2022, 2021 and 2020.

The Company adopted a Supplemental Executive Retirement Plan (“SERP”), effective January 1, 2019, which was amended effective January 1, 2022. The SERP benefits certain key senior executives of the Company who are selected by the Board to participate. The SERP is intended to provide a benefit from the Company upon retirement, death, disability or voluntary or involuntary termination of services (other than “for cause”). Under the SERP, the Company may, but is not required to, make discretionary contributions to the executive’s accounts from time to time. The contributions may be fully vested or subject to vesting conditions imposed by the Board of Directors with respect to the contributions; provided, however, that all unvested amounts credited to an executive’s account will become fully vested upon the executive’s death or disability or upon the occurrence of a change of control (as defined in the SERP). Company contributions to the SERP on behalf of an executive are credited with earnings and losses based on the executive’s investment elections. The investment options under the SERP are currently the same as those offered under the Company’s profit sharing plan, except that Company stock is not an available investment option under the SERP. An executive’s vested account is payable to the participant following his or her termination in a single lump sum or installments, as elected by the participant. The SERP as amended allows selected participants to defer base and incentive compensation as well as the receipt of shares from vested restricted and performance stock units into the plan. At December 31, 2022 and 2021, other assets on the consolidated balance sheet include $2,172,000 and $1,211,000 of SERP balances, respectively. The Company made contributions totaling $445,000, $1,163,000 and $719,000 to the SERP for the years ended December 31, 2022, 2021 and 2020, subsequent to the respective year ends, for certain executive officers.

The Company has a directors’ deferred compensation plan whereby the directors may elect to defer up to 100% of their directors’ fees. All deferred compensation is invested in the Company’s common stock held in a rabbi trust wherein the funds are used to purchase Company common shares on the open market. The stock is held in nominee name of the trustee, and the principal and earnings of the trust are held separate and apart from other funds of the Company and are used exclusively for the uses and purposes of the deferred compensation agreement. The accounts of the trust have been consolidated in the financial statements of the Company. As of December 31, 2022 and 2021, the rabbi trust held 929,210 and 936,897 shares, respectively, in trust for the Company’s directors and are reflected as treasury shares on the consolidated financial statements.

The Company has acquired life insurance policies on certain current and former executives and directors of acquired entities. At December 31, 2022 and 2021, other assets on the consolidated balance sheet include $33,241,000 and $32,404,000 and reported cash value income (net of related insurance premium expenses) of $836,000, $814,000 and $822,000 in 2022, 2021 and 2020, respectively.