Condensed Financial Information (Parent Company Only) - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks	$ 383,503	$ 363,289
Other assets	100,771	98,021
Total assets	5,332,047	5,034,592
LIABILITIES AND STOCKHOLDERS’ EQUITY
Subordinated debt	97,477	96,921
Interest payable and other liabilities	39,477	36,459
Total liabilities	4,739,129	4,581,732
Stockholders' equity	592,918	452,860	$ 410,058	$ 500,631
Total liabilities and stockholders’ equity	5,332,047	5,034,592
Equity Bancshares, Inc. [Member]
ASSETS
Cash and due from banks	105,071	12,729
Investment	573,809	531,272
Other assets	8,080	3,009
Total assets	693,489	552,226
LIABILITIES AND STOCKHOLDERS’ EQUITY
Subordinated debt	97,477	96,921
Interest payable and other liabilities	3,094	2,445
Total liabilities	100,571	99,366
Stockholders' equity	592,918	452,860
Total liabilities and stockholders’ equity	693,489	552,226
Equity Bancshares, Inc. [Member] | EBAC [Member]
ASSETS
Investment	3,120	3,261
Equity Bancshares, Inc. [Member] | ERMI [Member]
ASSETS
Investment	$ 3,409	$ 1,955