Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of TDR by Class and Modification Type) (Details)

v2.4.1.9
LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of TDR by Class and Modification Type) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
loan
Mar. 31, 2014
loan
Financing Receivable, Modifications [Line Items]    
No. of Loans 1ubsh_FinancingReceivableNewModificationsNumberOfContracts 4ubsh_FinancingReceivableNewModificationsNumberOfContracts
Recorded investment at period end $ 19ubsh_FinancingReceivableNewModificationsRecordedInvestment $ 3,141ubsh_FinancingReceivableNewModificationsRecordedInvestment
Troubled Debt Restructuring Term Modification at Market Rate [Member]    
Financing Receivable, Modifications [Line Items]    
No. of Loans 1ubsh_FinancingReceivableNewModificationsNumberOfContracts
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
4ubsh_FinancingReceivableNewModificationsNumberOfContracts
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
Recorded investment at period end 19ubsh_FinancingReceivableNewModificationsRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
3,141ubsh_FinancingReceivableNewModificationsRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
Troubled Debt Restructuring Term Modification at Market Rate [Member] | Commercial Real Estate - Owner Occupied [Member]    
Financing Receivable, Modifications [Line Items]    
No. of Loans   1ubsh_FinancingReceivableNewModificationsNumberOfContracts
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ubsh_CommercialRealEstateOwnerOccupiedMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
Recorded investment at period end   2,732ubsh_FinancingReceivableNewModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ubsh_CommercialRealEstateOwnerOccupiedMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
Troubled Debt Restructuring Term Modification at Market Rate [Member] | Single Family Investment Real Estate [Member]    
Financing Receivable, Modifications [Line Items]    
No. of Loans   1ubsh_FinancingReceivableNewModificationsNumberOfContracts
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ubsh_SingleFamilyInvestmentRealEstateMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
Recorded investment at period end   113ubsh_FinancingReceivableNewModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ubsh_SingleFamilyInvestmentRealEstateMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
Troubled Debt Restructuring Term Modification at Market Rate [Member] | Commercial and Industrial [Member]    
Financing Receivable, Modifications [Line Items]    
No. of Loans 1ubsh_FinancingReceivableNewModificationsNumberOfContracts
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ubsh_CommercialAndIndustrialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
 
Recorded investment at period end 19ubsh_FinancingReceivableNewModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ubsh_CommercialAndIndustrialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
 
Troubled Debt Restructuring Term Modification at Market Rate [Member] | Other Commercial [Member]    
Financing Receivable, Modifications [Line Items]    
No. of Loans   2ubsh_FinancingReceivableNewModificationsNumberOfContracts
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ubsh_OtherCommercialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember
Recorded investment at period end   $ 296ubsh_FinancingReceivableNewModificationsRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ubsh_OtherCommercialMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= ubsh_TroubleDebtRestructuringTermModificationAtMarketRateMember