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Stock-Based Compensation Plans (Schedule of Compensation Expense Recognized in Connection with Restricted Stock Awards and MSPP) (Details) (USD $)
In Thousands, unless otherwise specified |
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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| Restricted Stock Awards and Management Stock Purchase Plan [Member] | |||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Compensation expense | $ 321 | $ 222 | $ 228 |
| Related income tax benefit | 112 | 78 | 80 |
| Fair value of grants vested | 332 | 229 | 121 |
| Restricted Stock Units (RSUs) [Member] | |||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Compensation expense | 40 | 0 | 0 |
| Restricted Stock [Member] | |||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Compensation expense | 214 | 149 | 163 |
| Management Stock Purchase Plan [Member] | |||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |||
| Compensation expense | $ 67 | $ 73 | $ 65 |