XML 50 R39.htm IDEA: XBRL DOCUMENT v3.7.0.1
Share Repurchase Program and Treasury Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Share Repurchase Program and Treasury Stock (Textuals) [Abstract]      
Remaining Amount to Repurchase under the program $ 733,500    
Shares Purchased Under Share Repurchase Program 26,500,000    
Treasury Stock, Value, Acquired, Cost Method $ 249,949 $ 250,000 $ 499,992
Number of shares repurchased (505,593) (732,245)  
Average price of share repurchased, per share $ 494.35 $ 341.39  
Exercise of stock options and restricted stock units, shares reissued 153,413 131,737