|
Employee Benefits (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Fair Value Assumptions: | |||
| Weighted average fair value of awards issued | $ 5.22 | $ 4.26 | $ 3.71 |
| Expected volatility | 46.96% | 47.72% | 69.87% |
| Expected dividends | 2.52% | 2.87% | 1.30% |
| Risk-free rate | 1.55% | 0.98% | 0.62% |
| Expected term (years) | 4 years 6 months | 4 years | 4 years |