Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Restricted cash	$ 309,187,000	$ 0
5.25% Senior Notes due 2025 \| Senior unsecured notes
Debt Instrument [Line Items]
Debt instrument face amount	$ 300,000,000.0
Interest rate (percent)	5.25%

Face (par) amount of debt instrument at time of issuance.

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