Share Repurchase Program and Treasury Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Share Repurchase Program and Treasury Stock (Textuals) [Abstract]
Remaining Amount to Repurchase under the program	$ 1,100,000
Shares Purchased Under Share Repurchase Program	25,700,000
Treasury Stock, Value, Acquired, Cost Method	$ 374,994	$ 371,200	$ 494,966
Number of shares repurchased	(1,048,075)	(1,167,796)
Average price of share repurchased, per share	$ 357.77	$ 317.86
Exercise of stock options and restricted stock units, shares reissued	193,517	281,627