Annual report pursuant to Section 13 and 15(d)

DERIVATIVES (Summary of the Derivatives) (Details)

v2.4.1.9
DERIVATIVES (Summary of the Derivatives) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
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Dec. 31, 2013
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Cash Flow Hedging [Member]    
Summary of the derivative designated as a cash flow hedge    
Notional Amount $ 263,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember 		 
Receive Fixed - Pay Floating Interest Rate Swaps [Member] | Cash Flow Hedging [Member]    
Summary of the derivative designated as a cash flow hedge    
Positions 4us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		8us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Notional Amount 55,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		100,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Asset 580us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		  
Liability   516us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Receive Rate 4.93%ubsh_DerivativeInterestReceiveRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		5.17%ubsh_DerivativeInterestReceiveRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Pay Rate 3.55%ubsh_DerivativeInterestPayRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		3.89%ubsh_DerivativeInterestPayRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Life (Years) 4 years 8 months 19 days 5 years 8 months 19 days
Receive Fixed - Pay Floating Interest Rate Swaps [Member] | Interest Rate Swap [Member]    
Summary of the derivative designated as a cash flow hedge    
Positions 30us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		1us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Notional Amount 122,793invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		718invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Asset 2,681us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		33us-gaap_DerivativeAssets
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Receive Rate 4.29%ubsh_DerivativeInterestReceiveRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		4.58%ubsh_DerivativeInterestReceiveRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Pay Rate 2.50%ubsh_DerivativeInterestPayRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember 		2.92%ubsh_DerivativeInterestPayRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_ReceiveFixedPayFloatingInterestRateSwapsMember
Life (Years) 7 years 1 month 21 days 8 years 7 months 2 days
Pay Fixed - Receive Floating Interest Rate Swaps [Member] | Cash Flow Hedging [Member]    
Summary of the derivative designated as a cash flow hedge    
Positions 7us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		1us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Notional Amount 208,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		36,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Asset      
Liability 8,433us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		3,046us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Receive Rate 0.26%ubsh_DerivativeInterestReceiveRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		[1] 0.25%ubsh_DerivativeInterestReceiveRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Pay Rate 2.77%ubsh_DerivativeInterestPayRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		[1] 3.51%ubsh_DerivativeInterestPayRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Life (Years) 2 years 1 month 13 days [1] 3 years 5 months 16 days
Pay Fixed - Receive Floating Interest Rate Swaps [Member] | Interest Rate Swap [Member]    
Summary of the derivative designated as a cash flow hedge    
Positions 30us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		1us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Notional Amount 122,793invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		718invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Liability $ 2,681us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		$ 33us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Receive Rate 2.50%ubsh_DerivativeInterestReceiveRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		2.92%ubsh_DerivativeInterestReceiveRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Pay Rate 4.29%ubsh_DerivativeInterestPayRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember 		4.58%ubsh_DerivativeInterestPayRate
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= ubsh_PayFixedReceiveFloatingInterestRateSwapsMember
Life (Years) 7 years 1 month 21 days 8 years 7 months 2 days
[1] Due to their deferred nature, the rates and the life exclude the four FHLB advance swaps.