Share-Based Compensation - Restricted Stock Units (Details)	9 Months Ended
	Sep. 30, 2020
Minimum | Performance And Market-Based Restricted Stock Units
Share-Based Compensation
Stock incentive plan, vesting period	3 years
Minimum | Vesting Period One | Time Restricted Stock Units
Share-Based Compensation
Stock incentive plan, vesting period	1 year
Minimum | Vesting Period Two | Time Restricted Stock Units
Share-Based Compensation
Stock incentive plan, vesting period	3 years
Maximum | Performance And Market-Based Restricted Stock Units
Share-Based Compensation
Stock incentive plan, vesting period	4 years
Maximum | Vesting Period One | Time Restricted Stock Units
Share-Based Compensation
Stock incentive plan, vesting period	2 years
Maximum | Vesting Period Two | Time Restricted Stock Units
Share-Based Compensation
Stock incentive plan, vesting period	4 years