v3.25.4
Regulatory Matters - Summary of Company's and Equity Bank's Capital Amounts and Ratios (Detail)
$ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio 0.10  
Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio 0.08  
Common equity Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio 6.50%  
Tier 1 leverage to average assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio 0.05  
Equity Bancshares, Inc. [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital to risk weighted assets, Actual Amount $ 769,823 $ 720,736
Total capital to risk weighted assets, Actual Ratio 0.1631 0.1807
Tier 1 capital to risk weighted assets, Actual Amount $ 641,476 $ 602,496
Tier 1 capital to risk weighted assets, Actual Ratio 0.1359 0.1511
Common equity Tier 1 capital to risk weighted assets, Actual Amount $ 617,168 $ 578,550
Common equity Tier 1 capital to risk weighted assets, Actual Ratio 0.1308 0.1451
Tier 1 leverage to average assets, Actual Amount $ 641,476 $ 602,496
Tier 1 leverage to average assets, Actual Ratio 0.1064 0.1167
Equity Bancshares, Inc. [Member] | Base III Phase-In [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount $ 495,484 $ 418,716
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio 0.105 0.105
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount $ 401,106 $ 338,961
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio 0.085 0.085
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount $ 330,323 $ 279,144
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio 7.00% 7.00%
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Amount $ 241,199 $ 206,442
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio 0.04 0.04
Equity Bank [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital to risk weighted assets, Actual Amount $ 691,869 $ 607,579
Total capital to risk weighted assets, Actual Ratio 0.148 0.1527
Total capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount $ 467,485 $ 397,830
Total capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio 0.10 0.10
Tier 1 capital to risk weighted assets, Actual Amount $ 637,359 $ 562,870
Tier 1 capital to risk weighted assets, Actual Ratio 0.1363 0.1415
Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount $ 373,988 $ 318,264
Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio 0.08 0.08
Common equity Tier 1 capital to risk weighted assets, Actual Amount $ 637,359 $ 562,870
Common equity Tier 1 capital to risk weighted assets, Actual Ratio 0.1363 0.1415
Common equity Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount $ 303,866 $ 258,590
Common equity Tier 1 capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio 6.50% 6.50%
Tier 1 leverage to average assets, Actual Amount $ 637,359 $ 562,870
Tier 1 leverage to average assets, Actual Ratio 0.106 0.1093
Tier 1 leverage to average assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Amount $ 300,753 $ 257,500
Tier 1 leverage to average assets, To Be Well Capitalized Under Prompt Corrective Provisions, Actual Ratio 0.05 0.05
Equity Bank [Member] | Base III Phase-In [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount $ 490,860 $ 417,722
Total capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio 0.105 0.105
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount $ 397,363 $ 338,156
Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio 0.085 0.085
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Amount $ 327,240 $ 278,481
Common equity Tier 1 capital to risk weighted assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio 7.00% 7.00%
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Amount $ 240,602 $ 206,000
Tier 1 leverage to average assets, Minimum Required for Capital Adequacy Purposes, Actual Ratio 0.04 0.04