Long-term Incentive Compensation (Summary of Equity-Classified Stock Option Activity) (Details) - Stock options shares in Thousands	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Number of Options
Beginning balance (in shares) | shares	3,006
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Forfeited or expired (in shares) | shares	(152)
Ending balance (in shares) | shares	2,854
Exercisable (in shares) | shares	2,854
Weighted Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 8.98
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	0
Forfeited or expired (in dollars per share) | $ / shares	26.35
Ending balance (in dollars per share) | $ / shares	8.06
Exercisable (in dollars per share) | $ / shares	$ 8.06