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Equity-based Compensation Plan (Assumptions used in estimating fair value of the options granted) (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology Abstract    
Dividend yield 1.89% 1.87%
Expected volatility 40.93% 42.08%
Risk-free interest rate 2.41% 2.38%
Expected life (in years) 8 years 8 years