Annual report [Section 13 and 15(d), not S-K Item 405]

REGULATORY MATTERS AND CAPITAL (Schedule of Bank Capital and Ratio) (Details)

v3.25.4
REGULATORY MATTERS AND CAPITAL (Schedule of Bank Capital and Ratio) (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common Equity Tier 1 capital to risk weighted assets, actual amount $ 3,074,066 $ 2,063,163
Common Equity Tier 1 capital to risk weighted assets, actual ratio 0.101 0.0996
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount $ 1,369,633 $ 932,152
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, ratio 0.045 0.045
Tier 1 capital to risk weighted assets, actual amount $ 3,240,422 $ 2,229,519
Tier 1 capital to risk weighted assets, actual ratio 0.1064 0.1076
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount $ 1,827,306 $ 1,243,226
Tier 1 capital ratio of risk-weighted assets, required for capital adequacy purposes, ratio 0.06 0.06
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount $ 1,827,306 $ 1,243,226
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio 0.06 0.06
Total capital to risk weighted assets, actual amount $ 4,232,521 $ 2,819,398
Total capital to risk weighted assets, actual ratio 0.139 0.1361
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount $ 2,435,983 $ 1,657,251
Total capital to risk weighted assets, required for capital adequacy purposes, ratio 0.08 0.08
Total capital to risk weighted assets, required in order to be well capitalized under PCA, amount $ 3,044,979 $ 2,071,564
Total capital to risk weighted assets, required in order to be well capitalized under PCA, ratio 0.10 0.10
Tier 1 capital to average adjusted assets, actual amount $ 3,240,422 $ 2,229,519
Tier 1 capital to average adjusted assets, actual ratio 0.091 0.0929
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount $ 1,424,361 $ 959,965
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio 0.04 0.04
Capital conservation buffer 0.025 0.025
Atlantic Union Bank    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Common Equity Tier 1 capital to risk weighted assets, actual amount $ 3,952,859 $ 2,563,499
Common Equity Tier 1 capital to risk weighted assets, actual ratio 0.1302 0.1244
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount $ 1,366,196 $ 927,311
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, ratio 0.045 0.045
Common Equity Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount $ 1,973,394 $ 1,339,449
Common Equity Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio 0.065 0.065
Tier 1 capital to risk weighted assets, actual amount $ 3,952,859 $ 2,563,499
Tier 1 capital to risk weighted assets, actual ratio 0.1302 0.1244
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount $ 1,821,594 $ 1,236,414
Tier 1 capital ratio of risk-weighted assets, required for capital adequacy purposes, ratio 0.06 0.06
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount $ 2,428,792 $ 1,648,552
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio 0.08 0.08
Total capital to risk weighted assets, actual amount $ 4,245,839 $ 2,740,617
Total capital to risk weighted assets, actual ratio 0.1398 0.133
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount $ 2,429,665 $ 1,648,491
Total capital to risk weighted assets, required for capital adequacy purposes, ratio 0.08 0.08
Total capital to risk weighted assets, required in order to be well capitalized under PCA, amount $ 3,037,081 $ 2,060,614
Total capital to risk weighted assets, required in order to be well capitalized under PCA, ratio 0.10 0.10
Tier 1 capital to average adjusted assets, actual amount $ 3,952,859 $ 2,563,499
Tier 1 capital to average adjusted assets, actual ratio 0.1113 0.1074
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount $ 1,420,614 $ 954,748
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio 0.04 0.04
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, amount $ 1,775,768 $ 1,193,435
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, ratio 0.05 0.05