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

LOANS AND ALLOWANCE FOR LOAN LOSSES (Narrative) (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($) loan	Sep. 30, 2016 USD ($) loan	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Period for restructured loan to be considered default		90 days
Provision for unfunded commitments		$ 175,000	$ 300,000
Total loans held for investment, net	$ 6,148,918,000	6,148,918,000	5,543,621,000	$ 5,671,462,000
Acquired Performing Loan Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	1,200,000,000	1,200,000,000		1,400,000,000
Remaining discount on acquired loans	18,200,000	18,200,000		20,800,000
Purchased Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	62,346,000	62,346,000	78,606,000	73,737,000
Purchased impaired loans (gross)	$ 77,900,000	$ 77,900,000		90,300,000
Commercial Real Estate - Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts \| loan	1	1
Subsequent default of a restructured loan	$ 23,000	$ 23,000
Total loans held for investment, net	857,142,000	857,142,000	863,578,000	860,086,000
Commercial Real Estate - Owner Occupied \| Purchased Impaired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment, net	$ 19,064,000	$ 19,064,000	$ 28,694,000	$ 27,388,000