Atlantic Union Bankshares Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 loan	Dec. 31, 2013
Federal Home Loan Bank requires Bank to maintain percentage of stock equal to outstanding borrowings	4.50%
Percentage of Federal Reserve Bank of Richmond reserve	6.00%
Number of loan portfolio level segments	2ubsh_NumberOfLoanPortfolioLevelSegments
Number of loan class levels for reporting purposes	14
Number of loan class levels for reporting purposes within commercial loan portfolio segment	7
Number of loan class levels for reporting purposes within consumer loan portfolio segment	7
Held to maturity debt securities	$ 0us-gaap_HeldToMaturitySecurities
Held for trading securities	0us-gaap_TradingSecurities
Future payments, contractual term	6 months
Accruals for uncertain tax positions	0
Impairment charges for goodwill or intangible assets	0us-gaap_GoodwillImpairmentLoss
Goodwill	293,522,000us-gaap_Goodwill	59,400,000us-gaap_Goodwill
Liabilities for post retirement benefits payable to other beneficiaries	$ 3,800,000	$ 3,300,000
Minimum [Member]
Commercial loans on nonaccrual status, period	90 days
Period of updating independent appraisal	12 months
Interest rate lock commitments period	30 days
Estimated useful life of bank premises	3 years
Percentage of fair value of the derivative instruments for the hedge to be highly effective	80.00%
Maximum tax benefit realized	50.00%
Maximum [Member]
Maximum period for net realizable value	180 days
Commercial loans on nonaccrual status, period	180 days
Period of updating independent appraisal	24 months
Period past due to charge off consumer loans	120 days
Interest rate lock commitments period	120 days
Estimated useful life of bank premises	40 years
Percentage of fair value of the derivative instruments for the hedge to be highly effective	125.00%
Core Deposits [Member] \| Minimum [Member]
Intangible assets, amortization period	4 years
Core Deposits [Member] \| Maximum [Member]
Intangible assets, amortization period	14 years