Stockholders' Equity - Reconciliation of Denominators used in Computation of Basic and Diluted Earnings Per Share (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stockholders' Equity Note [Abstract]
Basic weighted average shares outstanding	296,595,100	296,842,771	296,642,783	296,755,815
Weighted shares assumed upon exercise of stock options	782,494	873,604	842,300	945,509
Diluted weighted average shares outstanding	297,377,594	297,716,375	297,485,083	297,701,324