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Summary of Significant Accounting Policies - Leases (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Cumulative effect of the adoption of the ASC 842	$ 775,806,000	$ 785,426,000		$ 832,971,000	$ 758,648,000
Cumulative Effect of Adoption
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Cumulative effect of the adoption of the ASC 842		$ (42,808,000)
Cumulative Effect of Adoption | ASU 2016-02
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Cumulative effect of the adoption of the ASC 842			$ 42,808,000

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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