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LOANS AND ALLOWANCE FOR LOAN LOSSES (Narrative) (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2014
loan
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Dec. 31, 2013
loan
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Dec. 31, 2012
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Nonaccrual loans | $ 19,255,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus | $ 15,035,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus | $ 26,200,000us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus |
| Nonaccrual interest lost | 795,000us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans | 778,000us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans | 1,300,000us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans |
| Average investment in impaired loans | 141,184,000us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment | 128,479,000us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment | 166,800,000us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment |
| Interest income recorded on impaired loans | 5,871,000us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod | 4,321,000us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod | 6,600,000us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod |
| Restructured loans that defaulted in the current period | 24,000us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 | 43,000us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 | |
| Period for restructured loan to be considered default | 90 days | ||
| Loans considered to be trouble debt restructurings | 26,777,000us-gaap_FinancingReceivableModificationsRecordedInvestment | 41,824,000us-gaap_FinancingReceivableModificationsRecordedInvestment | |
| Number of restructured loans that defaulted in current period | 1ubsh_NumberOfFinancingReceivableModificationsDefaultDuringPeriod | 1ubsh_NumberOfFinancingReceivableModificationsDefaultDuringPeriod | |
| Nonaccrual loans excluded from impaired loan | 0ubsh_NonAccrualLoansExcludedFromImpairedLoans | 0ubsh_NonAccrualLoansExcludedFromImpairedLoans | |
| Acquired performing loan portfolio | 5,345,996,000us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome | 3,039,368,000us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome | 2,966,847,000us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome |
| Acquired Performing Loan Portfolio [Member] | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Acquired performing loan portfolio |
1,800,000,000us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = ubsh_AcquiredPerformingLoanPortfolioMember |
377,800,000us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = ubsh_AcquiredPerformingLoanPortfolioMember |
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| Remaining discount on loans |
$ 24,300,000ubsh_RemainingDiscountOnLoans / us-gaap_InternalCreditAssessmentAxis = ubsh_AcquiredPerformingLoanPortfolioMember |
$ 3,300,000ubsh_RemainingDiscountOnLoans / us-gaap_InternalCreditAssessmentAxis = ubsh_AcquiredPerformingLoanPortfolioMember |
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| X | ||||||||||
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- Definition
Non accrual loans excluded from impaired loans. No definition available.
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- Definition
Number of financing receivable modifications defaulted during period. No definition available.
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- Definition
Period for restructured loan to be considered default No definition available.
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- Definition
Remaining discount on loans. No definition available.
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- Details
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| X | ||||||||||
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- Definition
The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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