Summary of Significant Accounting Policies - Fair Value Measurements (Details) $ in Thousands, € in Millions	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Recurring
Fair Value Measurements
Investments		$ 1,000,000
Assets, Fair Value Disclosure [Abstract]
Deferred costs and other assets		113,779
Other assets, fair value disclosure			$ 88,805
Assets, fair value		1,113,779
Financial Liabilities Fair Value Disclosure [Abstract]
Other liabilities, fair value disclosure		38,146	8,605
Level 1 | Recurring
Assets, Fair Value Disclosure [Abstract]
Deferred costs and other assets		97,696
Other assets, fair value disclosure			73,020
Assets, fair value		97,696
Level 2 | Recurring
Fair Value Measurements
Investments		1,000,000
Assets, Fair Value Disclosure [Abstract]
Deferred costs and other assets		16,083
Other assets, fair value disclosure			15,785
Assets, fair value		1,016,083
Financial Liabilities Fair Value Disclosure [Abstract]
Other liabilities, fair value disclosure		9,774	$ 8,605
Level 3 | Recurring
Financial Liabilities Fair Value Disclosure [Abstract]
Other liabilities, fair value disclosure		$ 28,372
Exchangeable Debt | Embedded derivative financial instruments
Fair Value Measurements
Interest rate swap agreements and foreign currency forward contracts, gross liability balance | €	€ 750.0