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Share Based Payments (Details 3)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Share-based Payment Arrangement [Abstract]    
Weighted average expected stock-price volatility 27.00% 28.00%
Weighted average expected option life 5 years 5 years
Weighted average risk-free interest rate 2.50% 2.50%
Weighted average dividend yield 2.00% 2.00%