Stock-Based Compensation - Restricted Stock Units (Details) - Restricted stock units - $ / shares	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Unvested stock award shares
Balance at the beginning of the period (in shares)	934,000	435,000
Granted (in shares)	608,000	663,000
Vested (in shares)	350,000	141,000
Forfeited (in shares)	16,000	16,000
Balance at the end of the period (in shares)	1,176,000	941,000
Weighted average grant date fair value
Nonvested, weighted average grant date fair value. beginning of period (in dollars per share)	$ 54	$ 47
Granted (in dollars per share)	59	57
Vested (in dollars per share)	53	47
Forfeited (in dollars per share)	56	54
Nonvested, weighted average grant date fair value. end of period (in dollars per share)	$ 57	$ 54