Share-based Compensation (Summary of the Status of Non-vested Time-based Restricted Stock and Restricted Stock Units) (Details) - Time-Based Restricted Stock and Restricted Stock Units [Member] shares in Thousands	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Balance, shares (in shares) | shares	5,189
Granted, shares (in shares) | shares	9,104
Vested, shares (in shares) | shares	(1,025)
Forfeited, shares (in shares) | shares	(93)
Balance, shares (in shares) | shares	13,175
Balance, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 27.58
Granted, weighted average grant-date fair value (in dollars per share) | $ / shares	20.54
Vested, weighted average grant-date fair value (in dollars per share) | $ / shares	27.58
Forfeited, weighted average grant-date fair value (in dollars per share) | $ / shares	27.57
Balance, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 22.72