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REGULATORY MATTERS AND CAPITAL (Schedule of Bank Capital and Ratio) (Details) $ in Thousands | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
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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 | $ 1,512,507 | $ 1,437,908
Common Equity Tier 1 capital to risk weighted assets, actual ratio | 10.26 | 10.24
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 663,380 | $ 631,893
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, ratio | 4.50 | 4.50
Tier 1 capital to risk weighted assets, actual amount | $ 1,678,863 | $ 1,437,908
Tier 1 capital to risk weighted assets, actual ratio | 11.39 | 10.24
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 884,388 | $ 842,524
Tier 1 capital ratio of risk-weighted assets, required for capital adequacy purposes, ratio | 6.00 | 6.00
Total capital to risk weighted assets, actual amount | $ 2,063,356 | $ 1,773,835
Total capital to risk weighted assets, actual ratio | 14.00 | 12.63
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount | $ 1,179,061 | $ 1,123,569
Total capital to risk weighted assets, required for capital adequacy purposes, ratio | 8.00 | 8.00
Tier 1 capital to average adjusted assets, actual amount | $ 1,678,863 | $ 1,437,908
Tier 1 capital to average adjusted assets, actual ratio | 8.95 | 8.79
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount | $ 750,330 | $ 654,338
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio | 4.00 | 4.00
Atlantic Union Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Common Equity Tier 1 capital to risk weighted assets, actual amount | $ 1,824,693 | $ 1,704,426
Common Equity Tier 1 capital to risk weighted assets, actual ratio | 12.42 | 12.18
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 661,121 | $ 629,714
Common Equity Tier 1 capital to risk weighted assets, required for capital adequacy purposes, ratio | 4.50 | 4.50
Common Equity Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount | $ 954,952 | $ 909,587
Common Equity Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio | 6.50 | 6.50
Tier 1 capital to risk weighted assets, actual amount | $ 1,824,693 | $ 1,704,426
Tier 1 capital to risk weighted assets, actual ratio | 12.42 | 12.18
Tier 1 capital to risk weighted assets, required for capital adequacy purposes, amount | $ 881,494 | $ 839,619
Tier 1 capital ratio of risk-weighted assets, required for capital adequacy purposes, ratio | 6.00 | 6.00
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, amount | $ 1,175,326 | $ 1,119,492
Tier 1 capital to risk weighted assets, required in order to be well capitalized under PCA, ratio | 8.00 | 8.00
Total capital to risk weighted assets, actual amount | $ 1,924,016 | $ 1,747,620
Total capital to risk weighted assets, actual ratio | 13.09 | 12.48
Total capital to risk weighted assets, Required for Capital adequacy purposes, amount | $ 1,175,869 | $ 1,120,269
Total capital to risk weighted assets, required for capital adequacy purposes, ratio | 8.00 | 8.00
Total capital to risk weighted assets, required in order to be well capitalized under PCA, amount | $ 1,469,837 | $ 1,400,337
Total capital to risk weighted assets, required in order to be well capitalized under PCA, ratio | 10.00 | 10.00
Tier 1 capital to average adjusted assets, actual amount | $ 1,824,693 | $ 1,704,426
Tier 1 capital to average adjusted assets, actual ratio | 9.75 | 10.45
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, amount | $ 748,592 | $ 652,412
Tier 1 capital to average adjusted assets, required for capital adequacy purposes, ratio | 4.00 | 4.00
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, amount | $ 935,740 | $ 815,515
Tier 1 capital to average adjusted assets, required in order to be well capitalized under PCA, ratio | 5.00 | 5.00

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