PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed Statements of Cash Flows (Details) - South Plains Financial, Inc. [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income	$ 58,471	$ 49,717	$ 62,745
Adjustments:
Equity in undistributed subsidiary income	(15,193)	(25,259)	(34,932)
Amortization of debt issuance costs	139	186	186
Stock based compensation	2,624	2,318	2,157
Change in other assets	(1,976)	3,532	(3,378)
Change in other liabilities	347	(1,552)	1,004
Net cash from operating activities	44,412	28,942	27,782
Cash flows from financing activities:
Repayments of long-term borrowings	(50,000)	0	(12,372)
Proceeds from common stock issuance	451	0	0
Payments to tax authorities for stock-based compensation	(933)	(759)	(731)
Payments to repurchase common stock	(8,526)	(1,340)	(17,763)
Cash dividends paid on common stock	(10,101)	(9,154)	(8,745)
Net cash from financing activities	(69,109)	(11,253)	(39,611)
Net change in cash and cash equivalents	(24,697)	17,689	(11,829)
Beginning cash and cash equivalents	104,856	87,167	98,996
Ending cash and cash equivalents	$ 80,159	$ 104,856	$ 87,167