SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Windmark Sale [Abstract]
Aggregate purchase price			$ 0	$ 36,080
Pre-tax gain on sale of subsidiary	$ 0	$ 290	$ 0	33,778
City Bank [Member] | Bank Subsidiary [Member]
Subsidiaries Information [Abstract]
Wholly-Owned, Consolidated Subsidiaries			City Bank
Ruidoso Retail, Inc. [Member] | Non-bank Subsidiary [Member]
Subsidiaries Information [Abstract]
Wholly-Owned, Consolidated Subsidiaries			Ruidoso Retail, Inc.
CB Provence, LLC [Member] | Non-bank Subsidiary [Member]
Subsidiaries Information [Abstract]
Wholly-Owned, Consolidated Subsidiaries			CB Provence, LLC
CBT Brushy Creek, LLC [Member] | Non-bank Subsidiary [Member]
Subsidiaries Information [Abstract]
Wholly-Owned, Consolidated Subsidiaries			CBT Brushy Creek, LLC
CBT Properties, LLC [Member] | Non-bank Subsidiary [Member]
Subsidiaries Information [Abstract]
Wholly-Owned, Consolidated Subsidiaries			CBT Properties, LLC
South Plains Financial Capital Trusts ("SPFCT") III-V [Member] | Non-bank Subsidiary [Member]
Subsidiaries Information [Abstract]
Wholly-Owned, Equity Method Subsidiaries			South Plains Financial Capital Trusts (“SPFCT”) III-V
Windmark [Member]
Windmark Sale [Abstract]
Aggregate purchase price				36,100
Pre-tax gain on sale of subsidiary				$ 33,800