Stock-Based Compensation - Summary of Unvested Award Activity (Details)	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Restricted Stock Units
Shares
Unvested at beginning period (in shares) | shares	1,050,908
Granted (in shares) | shares	548,100
Vested (in shares) | shares	(487,660)
Unvested at end period (in shares) | shares	1,111,348
Weighted-Average Grant Date Fair Value
Unvested at beginning of period, Weighted-Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 5.55
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) | $ / shares	5.34
Vested, Weighted-Average Grant Date Fair Value (in dollars per share) | $ / shares	5.81
Unvested at end of period, Weighted-Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 5.34
Performance Stock Units
Shares
Unvested at beginning period (in shares) | shares	1,879,425
Granted (in shares) | shares	1,099,800
Vested (in shares) | shares	(227,500)
Unvested at end period (in shares) | shares	2,751,725
Weighted-Average Grant Date Fair Value
Unvested at beginning of period, Weighted-Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 7.65
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) | $ / shares	10.85
Vested, Weighted-Average Grant Date Fair Value (in dollars per share) | $ / shares	13.75
Unvested at end of period, Weighted-Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 8.42