General - Stock Compensation - Options - Activity (Details)	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Options
Outstanding, beginning of period (in shares) | shares	2,125,861
Granted (in shares) | shares	50,271
Forfeited (in shares) | shares	(3,333)
Exercised (in shares) | shares	(216,734)
Outstanding, end of period (in shares) | shares	1,956,065
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share) | $ / shares	$ 69.22
Granted (in dollars per share) | $ / shares	67.90
Forfeited (in dollars per share) | $ / shares	83.55
Exercised (in dollars per share) | $ / shares	51.97
Outstanding, end of period (in dollars per share) | $ / shares	$ 71.07
Vested and Expected to Vest
Vested and expected to vest end of period (in shares) | shares	1,947,250
Vested and expected to vest end of period (in dollars per share) | $ / shares	$ 71.07
Exercisable, end of period (in shares) | shares	1,613,491
Exercisable, end of period (in dollars per share) | $ / shares	$ 70.48