Stockholder's Equity - Changes in the Number of Ordinary Shares Outstanding and Treasury Shares Held by the Company (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Ordinary Shares Outstanding [Abstract]
Beginning balance	237,809,823	237,141,071
Common stock issued	1,672,923	938,485
Purchase of common stock	(465,822)	(269,733)
Ending balance	239,016,924	237,809,823
Ordinary Shares Held as Treasury Shares [Abstract]
Beginning balance	7,400,027	7,130,294
Purchase of common stock	465,822	269,733
Cancellation of shares under 2014 LTIP	(41,645)
Ending balance	7,824,204	7,400,027
Ordinary shares issued at the end of the period	246,841,128	245,209,850