Quarterly report pursuant to Section 13 or 15(d)

SEGMENT REPORTING DISCLOSURES (Narrative) (Details)

v2.4.1.9
SEGMENT REPORTING DISCLOSURES (Narrative) (Details)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Segment Reporting Information [Line Items]    
Number of reportable segments 2us-gaap_NumberOfReportableSegments  
Number of retail locations 131us-gaap_NumberOfStores  
Number of subsidiary bank 1ubsh_NumberOfSubsidiaryIncludedProvidingServicesToRetailAndCommercialCustomers  
Warehouse Line of Credit [Member] | LIBOR [Member]    
Segment Reporting Information [Line Items]    
Spread on 3-Month LIBOR 0.15%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= ubsh_WarehouseLineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= ubsh_WarehouseLineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
Mortgage banking segment interest - floor 0.00%ubsh_DebtFloorInterestRate
/ us-gaap_CreditFacilityAxis
= ubsh_WarehouseLineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
2.00%ubsh_DebtFloorInterestRate
/ us-gaap_CreditFacilityAxis
= ubsh_WarehouseLineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember