Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Carrying Values and Estimated Fair Values of the Company's Financial Instruments) (Details)

v2.4.1.9
FAIR VALUE MEASUREMENTS (Carrying Values and Estimated Fair Values of the Company's Financial Instruments) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
ASSETS    
Cash and cash equivalents $ 137,362us-gaap_CashAndCashEquivalentsFairValueDisclosure $ 133,260us-gaap_CashAndCashEquivalentsFairValueDisclosure
Securities available for sale, at fair value 1,089,664us-gaap_AvailableForSaleSecurities 1,102,114us-gaap_AvailableForSaleSecurities
Restricted stock 53,146us-gaap_RestrictedInvestmentsAtFairValue 54,854us-gaap_RestrictedInvestmentsAtFairValue
Loans held for sale 46,048us-gaap_LoansHeldForSaleFairValueDisclosure 42,519us-gaap_LoansHeldForSaleFairValueDisclosure
Net loans 5,381,792us-gaap_LoansReceivableFairValueDisclosure 5,340,759us-gaap_LoansReceivableFairValueDisclosure
Interest rate swap 4,684us-gaap_InterestRateDerivativeAssetsAtFairValue 2,681us-gaap_InterestRateDerivativeAssetsAtFairValue
Cash flow hedges 1,185us-gaap_CashFlowHedgeDerivativeInstrumentAssetsAtFairValue 580us-gaap_CashFlowHedgeDerivativeInstrumentAssetsAtFairValue
Accrued interest receivable 22,313us-gaap_AccountsReceivableFairValueDisclosure 21,775us-gaap_AccountsReceivableFairValueDisclosure
Bank owned life insurance 140,143us-gaap_BankOwnedLifeInsurance 139,005us-gaap_BankOwnedLifeInsurance
LIABILITIES    
Deposits 5,669,754us-gaap_DepositsFairValueDisclosure 5,637,929us-gaap_DepositsFairValueDisclosure
Borrowings 653,782us-gaap_DebtInstrumentFairValue 666,224us-gaap_DebtInstrumentFairValue
Accrued interest payable 1,818us-gaap_AccruedLiabilitiesFairValueDisclosure 1,899us-gaap_AccruedLiabilitiesFairValueDisclosure
Interest rate swap 4,684us-gaap_InterestRateDerivativeLiabilitiesAtFairValue 2,681us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
Cash flow hedges 10,854us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue 8,433us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
Carrying Value [Member]    
ASSETS    
Cash and cash equivalents 137,362us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		133,260us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Securities available for sale, at fair value 1,089,664us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		1,102,114us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Restricted stock 53,146us-gaap_RestrictedInvestmentsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		54,854us-gaap_RestrictedInvestmentsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Loans held for sale 46,048us-gaap_LoansHeldForSaleFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		42,519us-gaap_LoansHeldForSaleFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Net loans 5,356,778us-gaap_LoansReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		5,313,612us-gaap_LoansReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Interest rate swap 4,684us-gaap_InterestRateDerivativeAssetsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		2,681us-gaap_InterestRateDerivativeAssetsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Cash flow hedges 1,185us-gaap_CashFlowHedgeDerivativeInstrumentAssetsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		580us-gaap_CashFlowHedgeDerivativeInstrumentAssetsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Accrued interest receivable 22,313us-gaap_AccountsReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		21,775us-gaap_AccountsReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Bank owned life insurance 140,143us-gaap_BankOwnedLifeInsurance
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		139,005us-gaap_BankOwnedLifeInsurance
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
LIABILITIES    
Deposits 5,670,228us-gaap_DepositsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		5,638,770us-gaap_DepositsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Borrowings 674,348us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		686,935us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Accrued interest payable 1,818us-gaap_AccruedLiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		1,899us-gaap_AccruedLiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Interest rate swap 4,684us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		2,681us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Cash flow hedges 10,854us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		8,433us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS    
Cash and cash equivalents 137,362us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member 		133,260us-gaap_CashAndCashEquivalentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Securities available for sale, at fair value     
Restricted stock     
Loans held for sale     
Net loans     
Interest rate swap     
Cash flow hedges     
Accrued interest receivable     
Bank owned life insurance     
LIABILITIES    
Deposits     
Borrowings     
Accrued interest payable     
Interest rate swap     
Cash flow hedges     
Significant Other Observable Inputs Level 2 [Member]    
ASSETS    
Cash and cash equivalents     
Securities available for sale, at fair value 1,089,664us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		1,102,114us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Restricted stock 53,146us-gaap_RestrictedInvestmentsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		54,854us-gaap_RestrictedInvestmentsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Loans held for sale 46,048us-gaap_LoansHeldForSaleFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		42,519us-gaap_LoansHeldForSaleFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Net loans     
Interest rate swap 4,684us-gaap_InterestRateDerivativeAssetsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		2,681us-gaap_InterestRateDerivativeAssetsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Cash flow hedges 1,185us-gaap_CashFlowHedgeDerivativeInstrumentAssetsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		580us-gaap_CashFlowHedgeDerivativeInstrumentAssetsAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Accrued interest receivable 22,313us-gaap_AccountsReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		21,775us-gaap_AccountsReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Bank owned life insurance 140,143us-gaap_BankOwnedLifeInsurance
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		139,005us-gaap_BankOwnedLifeInsurance
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
LIABILITIES    
Deposits 5,669,754us-gaap_DepositsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		5,637,929us-gaap_DepositsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Borrowings 653,782us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		666,224us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Accrued interest payable 1,818us-gaap_AccruedLiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		1,899us-gaap_AccruedLiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Interest rate swap 4,684us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		2,681us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Cash flow hedges 10,854us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member 		8,433us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Significant Unobservable Inputs Level 3 [Member]    
ASSETS    
Cash and cash equivalents     
Securities available for sale, at fair value     
Restricted stock     
Loans held for sale     
Net loans 5,381,792us-gaap_LoansReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member 		5,340,759us-gaap_LoansReceivableFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Interest rate swap     
Cash flow hedges     
Accrued interest receivable     
Bank owned life insurance     
LIABILITIES    
Deposits     
Borrowings     
Accrued interest payable     
Interest rate swap     
Cash flow hedges     
Interest Rate Lock Commitments [Member]    
ASSETS    
Derivative assets 1,271us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateLockCommitmentsMember 		513us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateLockCommitmentsMember
Interest Rate Lock Commitments [Member] | Carrying Value [Member]    
ASSETS    
Derivative assets 1,271us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateLockCommitmentsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		513us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateLockCommitmentsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Interest Rate Lock Commitments [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS    
Derivative assets     
Interest Rate Lock Commitments [Member] | Significant Other Observable Inputs Level 2 [Member]    
ASSETS    
Derivative assets     
Interest Rate Lock Commitments [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS    
Derivative assets 1,271us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateLockCommitmentsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member 		513us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateLockCommitmentsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Best Effort Forward Delivery Commitments [Member]    
LIABILITIES    
Liabilities 367us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= ubsh_BestEffortForwardDeliveryCommitmentsMember 		 
Best Effort Forward Delivery Commitments [Member] | Carrying Value [Member]    
LIABILITIES    
Liabilities 367us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= ubsh_BestEffortForwardDeliveryCommitmentsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember 		 
Best Effort Forward Delivery Commitments [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
LIABILITIES    
Liabilities     
Best Effort Forward Delivery Commitments [Member] | Significant Other Observable Inputs Level 2 [Member]    
LIABILITIES    
Liabilities     
Best Effort Forward Delivery Commitments [Member] | Significant Unobservable Inputs Level 3 [Member]    
LIABILITIES    
Liabilities $ 367us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= ubsh_BestEffortForwardDeliveryCommitmentsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member