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REGULATORY MATTERS AND CAPITAL (Schedule of Bank Capital and Ratio) (Details) $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
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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 | $ 1,684,088 | $ 1,569,752
Common Equity Tier 1 capital to risk weighted assets, actual ratio | 0.0995 | 0.1024
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 761,648 | $ 689,832
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 | $ 1,850,444 | $ 1,736,108
Tier 1 capital to risk weighted assets, actual ratio | 0.1093 | 0.1132
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 1,014,869 | $ 920,199
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 | $ 2,319,160 | $ 2,173,543
Total capital to risk weighted assets, actual ratio | 0.1370 | 0.1417
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount | $ 1,354,254 | $ 1,227,124
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 | $ 1,850,444 | $ 1,736,108
Tier 1 capital to average adjusted assets, actual ratio | 0.0942 | 0.0901
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount | $ 785,751 | $ 770,747
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio | 0.0400 | 0.0400
Atlantic Union Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Common Equity Tier 1 capital to risk weighted assets, actual amount | $ 2,154,594 | $ 1,990,753
Common Equity Tier 1 capital to risk weighted assets, actual ratio | 0.1281 | 0.1303
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 756,883 | $ 687,520
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 | $ 1,093,276 | $ 993,085
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 | $ 2,154,594 | $ 1,990,753
Tier 1 capital to risk weighted assets, actual ratio | 0.1281 | 0.1303
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 1,009,178 | $ 916,694
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 | $ 1,345,570 | $ 1,222,258
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 | $ 2,238,106 | $ 2,044,123
Total capital to risk weighted assets, actual ratio | 0.1330 | 0.1338
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount | $ 1,346,229 | $ 1,222,196
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 | $ 1,682,786 | $ 1,527,745
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 | $ 2,154,594 | $ 1,990,753
Tier 1 capital to average adjusted assets, actual ratio | 0.1102 | 0.1037
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount | $ 782,067 | $ 767,889
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 | $ 977,583 | $ 959,862
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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