Stock-Based Compensation - PSU (Details) - Performance Share Units shares in Thousands	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares) | shares	927
Granted (in shares) | shares	1,275
Vested (in shares) | shares	0
Forfeited (in shares) | shares	(158)
Outstanding, ending balance (in shares) | shares	2,044
Weighted Average Grant Date Fair Value Per Unit
Unvested, beginning balance (in dollars per share) | $ / shares	$ 35.13
Granted (in dollars per share) | $ / shares	22.72
Vested (in dollars per share) | $ / shares	0
Forfeited (in dollars per share) | $ / shares	28.34
Unvested, ending balance (in dollars per share) | $ / shares	$ 27.91