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Commitments and Contingencies (Summary of Contractual and Notional Amounts of Financial Instruments) (Details) (USD $)
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Dec. 31, 2014
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Dec. 31, 2013
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| Home Equity Line of Credit [Member] |
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| Financial Instruments [Line Items] |
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|
| Contractual amounts of financial instrument |
$ 303,815,000 |
$ 276,671,000 |
| Commercial And Commercial Real Estate [Member] |
|
|
| Financial Instruments [Line Items] |
|
|
| Contractual amounts of financial instrument |
47,066,000 |
26,688,000 |
| Mortgage Loan Commitments [Member] |
|
|
| Financial Instruments [Line Items] |
|
|
| Contractual amounts of financial instrument |
10,975,000 |
6,408,000 |
| Letter of Credit [Member] |
|
|
| Financial Instruments [Line Items] |
|
|
| Contractual amounts of financial instrument |
3,103,000 |
1,789,000 |
| Other Commitments [Member] |
|
|
| Financial Instruments [Line Items] |
|
|
| Contractual amounts of financial instrument |
1,305,000 |
437,000 |
| Customer loan swaps |
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|
| Financial Instruments [Line Items] |
|
|
| Notional amount of derivative |
58,234,000 |
15,702,000 |
| Interest rate swaps |
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|
| Financial Instruments [Line Items] |
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|
| Notional amount of derivative |
$ 43,000,000 |
$ 43,000,000 |