Share-Based Compensation - Stock Option Activity (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Number of Options (in thousands)
Outstanding beginning balance (in shares) | shares	3,501
Granted (in shares) | shares	413
Exercised (in shares) | shares	(592)
Forfeited (in shares) | shares	(13)
Outstanding ending balance (in shares) | shares	3,309
Weighted Average Exercise Price per Option
Outstanding beginning balance (in dollars per share) | $ / shares	$ 51.87
Granted (in dollars per share) | $ / shares	92.63
Exercised (in dollars per share) | $ / shares	43.11
Forfeited (in dollars per share) | $ / shares	67.00
Outstanding ending balance (in dollars per share) | $ / shares	$ 58.48