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Borrowings (Junior Subordinated Debentures) (Details) (USD $)
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12 Months Ended |
1 Months Ended |
12 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Apr. 30, 2006
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Dec. 31, 2006
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Dec. 31, 2008
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| Junior Subordinated Debt [Member] |
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| Debt Instrument [Line Items] |
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| Interest expense on junior subordinated debentures |
$ 2,500,000 |
$ 2,500,000 |
$ 2,500,000 |
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| Value of trust preferred securities included in Tier I Capital |
43,000,000 |
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| Percentage of trust preferred securities included in Tier I Capital ratio |
17.30% |
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| Junior Subordinated Debt [Member] | Subsidiary One [Member] |
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| Debt Instrument [Line Items] |
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| Proceeds from issuance of trust preferred securities |
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36,100,000 |
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| Value of outstanding common shares of subsidiary owned by company |
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1,100,000 |
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| Debt instrument, interest rate |
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6.71% |
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| Debt instrument, interest rate terms |
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now floats at the 3 month LIBOR plus 140 basis points |
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| Debt interest rate, additional rate over three month LIBOR |
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1.40% |
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| Junior Subordinated Debt [Member] | Union Bankshares Capital Trust I [Member] |
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| Debt Instrument [Line Items] |
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| Value of outstanding common shares of subsidiary owned by company |
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248,000 |
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| Debt instrument, interest rate terms |
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The interest rate of the trust preferred securities until April 7, 2011 was a blended rate equal to the sum of (1) the product of 50% times the average three-month LIBOR plus 1.42%, plus (2) the product of 50% times 6.4725%. The rate is now the average three-month LIBOR plus 1.42%. |
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| Debt interest rate, additional rate over three month LIBOR |
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1.42% |
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| Trust preferred securities assumed in acquisition |
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8,000,000 |
| Aggregate amount of junior subordinated debt issued to subsidiary by acquired company, prior to acquisition |
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8,200,000 |
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| Debt Instrument, Term |
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30 years |
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| Debt instrument fixed rate |
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6.4725% |
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| interest rate multiplier applied to variable rate |
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50.00% |
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| interest rate multiplier applied to fixed rate |
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50.00% |
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| Interest rate swaps |
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| Debt Instrument [Line Items] |
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| Notional amount of derivative |
$ 43,000,000 |
$ 43,000,000 |
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