Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Summary of Shares Available in Each Plan) (Details)

v2.4.1.9
STOCK-BASED COMPENSATION (Summary of Shares Available in Each Plan) (Details) (2011 Plan [Member])
3 Months Ended
Mar. 31, 2015
2011 Plan [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning Authorization 1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= ubsh_TwoThousandAndElevenPlanMember
Granted (600,641)us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross
/ us-gaap_PlanNameAxis
= ubsh_TwoThousandAndElevenPlanMember
Remaining available for grant 399,359us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= ubsh_TwoThousandAndElevenPlanMember