Atlantic Union Bankshares Corporation Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVES (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
DERIVATIVES (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	$ 50,000		$ 50,000
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Unrealized gain (loss) within accumulated other comprehensive income, to be reclassified into earnings		$ (1,800)
Derivative, amount	200,000
Fair Value Hedging
Derivatives, Fair Value [Line Items]
Aggregate notional amount of the hedged items	89,800		74,700
Fair value of aggregate notional amount of the hedged items, unrealized loss	1,200		5,100
Loans
Derivatives, Fair Value [Line Items]
Carrying Amount of Hedged Asset/(Liabilities)	89,792		74,726
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	1,170		5,088
Available-for-sale Securities
Derivatives, Fair Value [Line Items]
Fair value of aggregate notional amount of the hedged items, unrealized loss	5,000		7,300
Carrying Amount of Hedged Asset/(Liabilities)	122,522		166,413
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities)	4,993		7,297
Available-for-sale Securities \| Fair Value Hedging
Derivatives, Fair Value [Line Items]
Aggregate notional amount of the hedged items	50,000		50,000
Fair value of aggregate notional amount of the hedged items, unrealized loss	$ 5,000		$ 7,300