Annual report pursuant to Section 13 and 15(d)

PARENT COMPANY FINANCIAL INFORMATION (Financial Information for the Parent Company - Statements of Cash Flows) (Details)

v2.4.1.9
PARENT COMPANY FINANCIAL INFORMATION (Financial Information for the Parent Company - Statements of Cash Flows) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Operating activities:      
Net income $ 52,591,000us-gaap_NetIncomeLoss $ 34,496,000us-gaap_NetIncomeLoss $ 35,411,000us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash and cash equivalents provided by (used in) operating activities      
Depreciation of bank premises and equipment 10,742,000us-gaap_DepreciationAmortizationAndAccretionNet 6,024,000us-gaap_DepreciationAmortizationAndAccretionNet 6,631,000us-gaap_DepreciationAmortizationAndAccretionNet
Acquisition accounting amortization, net (255,000)ubsh_AmortizationAccretionDiscountPremiumAcquisitions 1,585,000ubsh_AmortizationAccretionDiscountPremiumAcquisitions 1,579,000ubsh_AmortizationAccretionDiscountPremiumAcquisitions
Gains on securities transactions, net (1,695,000)us-gaap_GainLossOnSaleOfSecuritiesNet (21,000)us-gaap_GainLossOnSaleOfSecuritiesNet (190,000)us-gaap_GainLossOnSaleOfSecuritiesNet
Tax benefit from exercise of equity-based awards 187,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised 54,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised 2,600us-gaap_DeferredTaxExpenseFromStockOptionsExercised
Issuance of common stock for services 713,000us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims 477,000us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims 565,000us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
Decrease (increase) in other assets 4,938,000us-gaap_IncreaseDecreaseInOtherOperatingAssets (27,422,000)us-gaap_IncreaseDecreaseInOtherOperatingAssets (2,173,000)us-gaap_IncreaseDecreaseInOtherOperatingAssets
Net (decrease) increase in other liabilities 4,198,000us-gaap_IncreaseDecreaseInOtherOperatingLiabilities 6,263,000us-gaap_IncreaseDecreaseInOtherOperatingLiabilities 987,000us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net cash and cash equivalents provided by (used in) operating activities 125,184,000us-gaap_NetCashProvidedByUsedInOperatingActivities 157,029,000us-gaap_NetCashProvidedByUsedInOperatingActivities (21,991,000)us-gaap_NetCashProvidedByUsedInOperatingActivities
Investing activities:      
Sale of securities available for sale 289,389,000us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities 43,354,000us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities 18,944,000us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Net decrease (increase) in bank premises and equipment (7,124,000)us-gaap_PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease (4,759,000)us-gaap_PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease (2,102,000)us-gaap_PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease
Payments for equity method investment (60,000)us-gaap_PaymentsToAcquireEquityMethodInvestments (2,000,000)us-gaap_PaymentsToAcquireEquityMethodInvestments  
Cash received in acquisitions 49,989,000us-gaap_CashAcquiredFromAcquisition    
Net cash and cash equivalents provided by (used in) investing activities 6,303,000us-gaap_NetCashProvidedByUsedInInvestingActivities (218,690,000)us-gaap_NetCashProvidedByUsedInInvestingActivities (141,699,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
Financing activities:      
Payments on long-term borrowings 2,036,000us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt 2,234,000us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt (18,566,000)us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt
Cash dividends paid (25,494,000)us-gaap_PaymentsOfDividendsCommonStock (12,535,000)us-gaap_PaymentsOfDividendsCommonStock (8,969,000)us-gaap_PaymentsOfDividendsCommonStock
Net cash and cash equivalents (used in) provided by financing activities (71,250,000)us-gaap_NetCashProvidedByUsedInFinancingActivities 51,782,000us-gaap_NetCashProvidedByUsedInFinancingActivities 149,933,000us-gaap_NetCashProvidedByUsedInFinancingActivities
Increase (decrease) in cash and cash equivalents 60,237,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (9,879,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (13,757,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of the period 73,023,000us-gaap_CashAndCashEquivalentsAtCarryingValue 82,902,000us-gaap_CashAndCashEquivalentsAtCarryingValue 96,659,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of the period 133,260,000us-gaap_CashAndCashEquivalentsAtCarryingValue 73,023,000us-gaap_CashAndCashEquivalentsAtCarryingValue 82,902,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental schedule of noncash investing and financing activities      
Issuance of common stock in exchange for net assets in acquisition 549,523,000us-gaap_StockIssuedDuringPeriodValueAcquisitions    
Transactions Related to Bank Acquisitions      
Assets acquired 2,957,521,000us-gaap_NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1    
Liabilities assumed 2,642,120,000us-gaap_NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1    
Parent Company [Member]      
Operating activities:      
Net income 52,591,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
34,496,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
35,411,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Adjustments to reconcile net income to net cash and cash equivalents provided by (used in) operating activities      
Equity in undistributed net income from subsidiaries 15,482,000ubsh_EquityInUndistributedNetIncomeLossOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(7,685,000)ubsh_EquityInUndistributedNetIncomeLossOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(15,158,000)ubsh_EquityInUndistributedNetIncomeLossOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Depreciation of bank premises and equipment 464,000us-gaap_DepreciationAmortizationAndAccretionNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
468,000us-gaap_DepreciationAmortizationAndAccretionNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
473,000us-gaap_DepreciationAmortizationAndAccretionNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Acquisition accounting amortization, net 224,000ubsh_AmortizationAccretionDiscountPremiumAcquisitions
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Issuance of common stock for services 713,000us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
477,000us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
565,000us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Decrease (increase) in other assets 2,964,000us-gaap_IncreaseDecreaseInOtherOperatingAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(2,069,000)us-gaap_IncreaseDecreaseInOtherOperatingAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(756,000)us-gaap_IncreaseDecreaseInOtherOperatingAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net (decrease) increase in other liabilities (7,286,000)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
1,737,000us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
2,781,000us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net cash and cash equivalents provided by (used in) operating activities 65,152,000us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
27,424,000us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
23,316,000us-gaap_NetCashProvidedByUsedInOperatingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Investing activities:      
Net decrease (increase) in bank premises and equipment 863,000us-gaap_PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
  (23,000)us-gaap_PropertyPlantAndEquipmentGrossPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Payments for equity method investment (60,000)us-gaap_PaymentsToAcquireEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(2,000,000)us-gaap_PaymentsToAcquireEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Cash received in acquisitions 4,735,000us-gaap_CashAcquiredFromAcquisition
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Net cash and cash equivalents provided by (used in) investing activities 5,538,000us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(2,000,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(23,000)us-gaap_NetCashProvidedByUsedInInvestingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Financing activities:      
Advances on short-term borrowings 8,000,000us-gaap_ProceedsFromShortTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Payments on long-term borrowings (625,000)us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(625,000)us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(625,000)us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Cash dividends paid (25,494,000)us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(12,535,000)us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(8,969,000)us-gaap_PaymentsOfDividendsCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net issuance (repurchase) common stock (52,971,000)ubsh_ProceedsFromIssuancesPaymentsForRepurchasesOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(8,677,000)ubsh_ProceedsFromIssuancesPaymentsForRepurchasesOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(14,469,000)ubsh_ProceedsFromIssuancesPaymentsForRepurchasesOfCommonStock
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net cash and cash equivalents (used in) provided by financing activities (71,090,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(21,837,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(24,063,000)us-gaap_NetCashProvidedByUsedInFinancingActivities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Increase (decrease) in cash and cash equivalents (400,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
3,587,000us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(770,000)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Cash and cash equivalents at beginning of the period 10,092,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
6,505,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
7,275,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Cash and cash equivalents at end of the period 9,692,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
10,092,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
6,505,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Supplemental schedule of noncash investing and financing activities      
Issuance of common stock in exchange for net assets in acquisition 549,523,000us-gaap_StockIssuedDuringPeriodValueAcquisitions
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Transactions Related to Bank Acquisitions      
Assets acquired 2,957,521,000us-gaap_NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Liabilities assumed $ 2,642,120,000us-gaap_NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember