Options and Awards - Options Outstanding Rollforward (Details) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Number of Options Outstanding
Balance at beginning of period, (in shares)			4,428
Granted (in shares)	160	154	540	553
Forfeited (in shares)			(52)
Exercised (in shares)			(519)
Balance at end of period, (in shares)	4,397		4,397
Weighted Average Exercise Price
Balance at beginning of period, (in dollars per share)			$ 20.85
Granted (in dollars per share)			50.46	$ 44.96
Forfeited (in dollars per share)			32.02
Exercised (in dollars per share)			12.34
Balance at end of period, (in dollars per share)	$ 25.36		$ 25.36
Number of options vested (in shares)	2,501		2,501		2,557
Weighted average exercise price of options vested (in dollars per share)	$ 15.60		$ 15.60		$ 12.82