Long-term Incentive Compensation (Summary of Liability-Classified Restricted Stock Unit Activity) (Details) - Liability-Classified Restricted Stock Units shares in Thousands	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Number of Units
Beginning balance (in shares) | shares	7,937
Granted (in shares) | shares	0
Vested (in shares) | shares	(3,806)
Forfeited (in shares) | shares	(12)
Ending balance (in shares) | shares	4,119
Weighted Average Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 4.08
Granted (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	4.47
Forfeited (in dollars per share) | $ / shares	7.01
Ending balance (in dollars per share) | $ / shares	$ 5.83