Fair Value Measurements - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 643,380,000	$ 662,682,000	$ 643,380,000	$ 662,682,000	$ 710,621,000
Other assets	30,213,000		30,213,000		24,349,000
Reclassification of subsidiary long-term incentive plan liability related to modification	3,104,000
Incremental compensation cost	1,200,000
Other-than-temporary impairments	0	$ 0	0	$ 0
Money Market Accounts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	609,100,000		609,100,000		$ 679,300,000
Other assets	$ 500,000		$ 500,000