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Stock-Based Compensation Plans (Schedule of Compensation Expense Recognized in Connection with LTIP) (Details) (Long-Term Performance Share Plan [Member], 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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Long-Term Performance Share Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Compensation expense | $ 151 | $ 200 | $ 174 |
| Related income tax benefit | 53 | 70 | 61 |
| Fair value of grants vested | $ 0 | $ 497 | $ 609 |