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REGULATORY MATTERS AND CAPITAL (Schedule of Bank Capital and Ratio) (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Common Equity Tier 1 capital to risk weighted assets, actual amount | $ 1,790,183 | $ 1,684,088
Common Equity Tier 1 capital to risk weighted assets, actual ratio | 0.0984 | 0.0995
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 818,681 | $ 761,648
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, ratio | 0.0450 | 0.0450
Tier 1 capital to risk weighted assets, actual amount | $ 1,956,539 | $ 1,850,444
Tier 1 capital to risk weighted assets, actual ratio | 0.1076 | 0.1093
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 1,091,007 | $ 1,014,869
Tier 1 capital ratio of risk-weighted assets, required for capital adequacy purposes, ratio | 0.0600 | 0.0600
Total capital to risk weighted assets, actual amount | $ 2,464,817 | $ 2,319,160
Total capital to risk weighted assets, actual ratio | 0.1355 | 0.1370
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount | $ 1,455,243 | $ 1,354,254
Total capital to risk weighted assets, required for capital adequacy purposes, ratio | 0.0800 | 0.0800
Tier 1 capital to average adjusted assets, actual amount | $ 1,956,539 | $ 1,850,444
Tier 1 capital to average adjusted assets, actual ratio | 0.0963 | 0.0942
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount | $ 812,685 | $ 785,751
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio | 0.0400 | 0.0400
Capital conservation buffer | 0.0250 | 0.0250
Atlantic Union Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Common Equity Tier 1 capital to risk weighted assets, actual amount | $ 2,256,291 | $ 2,154,594
Common Equity Tier 1 capital to risk weighted assets, actual ratio | 0.1248 | 0.1281
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 813,566 | $ 756,883
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, ratio | 0.0450 | 0.0450
Common Equity Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount | $ 1,175,152 | $ 1,093,276
Common Equity Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio | 0.0650 | 0.0650
Tier 1 capital to risk weighted assets, actual amount | $ 2,256,291 | $ 2,154,594
Tier 1 capital to risk weighted assets, actual ratio | 0.1248 | 0.1281
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 1,084,755 | $ 1,009,178
Tier 1 capital ratio of risk-weighted assets, required for capital adequacy purposes, ratio | 0.0600 | 0.0600
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount | $ 1,446,340 | $ 1,345,570
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio | 0.0800 | 0.0800
Total capital to risk weighted assets, actual amount | $ 2,378,204 | $ 2,238,106
Total capital to risk weighted assets, actual ratio | 0.1315 | 0.1330
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount | $ 1,446,816 | $ 1,346,229
Total capital to risk weighted assets, required for capital adequacy purposes, ratio | 0.0800 | 0.0800
Total capital to risk weighted assets, required in order to be well capitalized under PCA, amount | $ 1,808,520 | $ 1,682,786
Total capital to risk weighted assets, required in order to be well capitalized under PCA, ratio | 0.1000 | 0.1000
Tier 1 capital to average adjusted assets, actual amount | $ 2,256,291 | $ 2,154,594
Tier 1 capital to average adjusted assets, actual ratio | 0.1116 | 0.1102
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount | $ 808,706 | $ 782,067
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio | 0.0400 | 0.0400
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, amount | $ 1,010,883 | $ 977,583
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, ratio | 0.0500 | 0.0500

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