Consolidated Statements of Stockholders' Equity (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Stock issued for employee stock purchase plan, shares (in shares)			42,510	59,475
Stock issued for compensation plans, shares (in shares)	70,602	42,459	263,630
Cash dividends per share (in dollars per share)	$ 0.20	$ 0.19	$ 0.40	$ 0.38
Stock issued for acquisition, shares (in shares)			1,128,087	18,275,074
Stock repurchases (in shares)	1,128,087	2,035,324	1,128,087	2,549,049
Spirit of Texas Bancshares, Inc.
Stock issued for compensation plans, shares (in shares)				286,820
Stock issued for acquisition, shares (in shares)		18,275,074