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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Spirit of Texas Bancshares, Inc. | Common Stock | Common Stock Spirit of Texas Bancshares, Inc. | Surplus | Surplus Spirit of Texas Bancshares, Inc. | Accumulated Other Comprehensive (Loss) Income | Undivided Profits
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2021 | $ 3,248,841 |  | $ 1,127 |  | $ 2,164,989 |  | $ (10,545) | $ 1,093,270
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Comprehensive (loss) income | (384,033) |  |  |  |  |  | (557,185) | 173,152
Stock issued for employee stock purchase plan | 1,151 |  | 1 |  | 1,150 |  |  |
Stock-based compensation plans, net | 7,370 |  | 2 |  | 7,368 |  |  |
Stock issued for Spirit acquisition |  | $ 464,918 |  | $ 183 |  | $ 464,735 |  |
Stock repurchases | (111,133) |  | (44) |  | (111,089) |  |  |
Dividends on common stock | (69,963) |  |  |  |  |  |  | (69,963)
Balance at Sep. 30, 2022 | 3,157,151 |  | 1,269 |  | 2,527,153 |  | (567,730) | 1,196,459
Balance at Jun. 30, 2022 | 3,259,895 |  | 1,288 |  | 2,569,060 |  | (450,428) | 1,139,975
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Comprehensive (loss) income | (36,699) |  |  |  |  |  | (117,302) | 80,603
Stock-based compensation plans, net | 3,111 |  |  |  | 3,111 |  |  |
Stock repurchases | (45,037) |  | (19) |  | (45,018) |  |  |
Dividends on common stock | (24,119) |  |  |  |  |  |  | (24,119)
Balance at Sep. 30, 2022 | 3,157,151 |  | 1,269 |  | 2,527,153 |  | (567,730) | 1,196,459
Balance at Dec. 31, 2022 | 3,269,362 |  | 1,270 |  | 2,530,066 |  | (517,560) | 1,255,586
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Comprehensive (loss) income | 124,330 |  |  |  |  |  | (26,820) | 151,150
Stock issued for employee stock purchase plan | 833 |  |  |  | 833 |  |  |
Stock-based compensation plans, net | 6,955 |  | 4 |  | 6,951 |  |  |
Stock repurchases | (39,999) |  | (23) |  | (39,976) |  |  |
Dividends on common stock | (75,926) |  |  |  |  |  |  | (75,926)
Balance at Sep. 30, 2023 | 3,285,555 |  | 1,251 |  | 2,497,874 |  | (544,380) | 1,330,810
Balance at Jun. 30, 2023 | 3,356,326 |  | 1,262 |  | 2,516,398 |  | (469,988) | 1,308,654
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Comprehensive (loss) income | (27,145) |  |  |  |  |  | (74,392) | 47,247
Stock-based compensation plans, net | 1,442 |  | 1 |  | 1,441 |  |  |
Stock repurchases | (19,977) |  | (12) |  | (19,965) |  |  |
Dividends on common stock | (25,091) |  |  |  |  |  |  | (25,091)
Balance at Sep. 30, 2023 | $ 3,285,555 |  | $ 1,251 |  | $ 2,497,874 |  | $ (544,380) | $ 1,330,810

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