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Earnings per Share (Weighted-average Number of Ordinary Shares Diluted) (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Notes to Consolidated Financial Statements [Abstract]      
Weighted average number of ordinary shares used in computation of the basic earnings per share 1,276,072 1,273,295 1,271,624
Effect of stock options and restricted shares 925 0 632
Weighted average number of ordinary shares used in computation of the diluted earnings per share 1,276,997 1,273,295 1,272,256