Annual report pursuant to Section 13 and 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Acquired Loan Portfolio and Accretable Yield) (Details)

v2.4.1.9
LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Acquired Loan Portfolio and Accretable Yield) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Carrying Amount of Loans      
Balance at beginning of period     $ 4,565us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
Balance at end of period 105,788us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality 3,622us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality 4,565us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
Purchased Impaired [Member]      
Accretable Yield      
Balance at beginning of period 2,980us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
3,147us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
 
Additions 34,653us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
   
Accretion (7,192)us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
(55)us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
 
Reclassification from nonaccretable difference 1,873us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
   
Other, net (3,358)ubsh_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldOthers
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
(112)ubsh_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldOthers
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
 
Balance at end of period 28,956us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
2,980us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
 
Carrying Amount of Loans      
Balance at beginning of period 3,622us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
4,565us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
 
Additions 145,454ubsh_AdditionsToAcquiredLoans
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
   
Net reductions for payments, foreclosures, and accretion (43,288)ubsh_NetReductionAcquiredLoansForPaymentsForeclosures
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
(943)ubsh_NetReductionAcquiredLoansForPaymentsForeclosures
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
 
Balance at end of period $ 105,788us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember
$ 3,622us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality
/ ubsh_FinancingReceivablesPurchasedImpairedAxis
= ubsh_PurchasedImpairedMember