Stock-Based Compensation (Calculation And Assumptions Utilized In Calculation Of Fair Values Of Options Granted) (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||||||
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Dec. 31, 2016 |
Dec. 31, 2015 |
[1] | Dec. 31, 2014 |
[1] | |||
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||||||
Aggregate grant date fair value | $ 1.4 | $ 0.9 | $ 0.1 | ||||
Weighted-average per share grant date fair value (in dollars per share) | $ 10.79 | $ 10.06 | $ 7.30 | ||||
Risk-free interest rate | 2.20% | 2.10% | 2.10% | ||||
Expected life in years | 7 years 11 months | 7 years 6 months | 6 years | ||||
Expected volatility (over expected life) | 30.00% | 30.50% | 35.10% | ||||
Expected dividend yield (over expected life) | 3.00% | 3.00% | 3.90% | ||||
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