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SECURITIES (Narrative) (Details) (USD $)
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3 Months Ended | 12 Months Ended |
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Mar. 31, 2015
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Dec. 31, 2014
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| SECURITIES [Abstract] | ||
| Federal Home Loan Bank requires Bank to maintain percentage of stock equal to outstanding borrowings | 4.25%ubsh_FederalHomeLoanBankRequiresBankToMaintainPercentageOfStockEqualToOutstandingBorrowings | 4.50%ubsh_FederalHomeLoanBankRequiresBankToMaintainPercentageOfStockEqualToOutstandingBorrowings |
| Percentage of Federal Reserve Bank of Richmond reserve | 6.00%ubsh_RequiredPercentageOfCommonStockInvestmentPercentageToOutstandingCapital | 6.00%ubsh_RequiredPercentageOfCommonStockInvestmentPercentageToOutstandingCapital |
| Restricted equity securities consist of Federal Reserve Bank stock | $ 23,800,000us-gaap_FederalReserveBankStock | $ 23,800,000us-gaap_FederalReserveBankStock |
| Federal Home Loan Bank Stock | 29,300,000us-gaap_FederalHomeLoanBankStock | 31,000,000us-gaap_FederalHomeLoanBankStock |
| Securities in a continuous loss position, more than 12 months, unrealized losses | 820,000us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses | 1,134,000us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses |
| Individual securities that had been in a continuous loss position for more than 12 months, amount | 69,021,000us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue | 96,404,000us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue |
| Individual securities that had been in a continuous loss position | 30us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 | 60us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 |
| Securities pledged to secure public deposits, repurchase agreements and other purposes | 402,300,000us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged | 397,000,000us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged |
| Credit-related OTTI | $ 0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities |
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- Definition
Federal home loan bank requires bank to maintain percentage of stock equal to outstanding borrowings. No definition available.
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- Definition
Required percentage of common stock investment percentage to outstanding capital. No definition available.
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- Definition
Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of the carrying amounts as of the date of the latest financial statement presented of securities which are owned but transferred to another party to serve as collateral to partially or fully secure a debt obligation, repurchase agreement or other current or potential obligation, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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