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Unsecured Line of Credit	12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]
Unsecured Line of Credit	8.Unsecured Line of Credit On December 16, 2020, the Company entered into an unsecured line of credit (the “Line of Credit”) for $100 million with multiple banks. During July 2021 additional banks were added under the Line of Credit, and the total borrowing capacity was increased to $450 million. The Line of Credit expires on December 16, 2023, at which time the Company may request additional one-year extensions thereafter. Interest under the Line of Credit is determined based on one-month U.S. dollar-denominated LIBOR plus 3.0%. The repayment of the Line of Credit is guaranteed by the Company. As of December 31, 2020, the capacity of the unsecured Line of Credit was $100 million. There was $375 million and no outstanding borrowings on the line of credit as of December 31, 2021 and 2020, respectively.

Unsecured Line of Credit

12 Months Ended

Dec. 31, 2021

8.Unsecured Line of Credit

On December 16, 2020, the Company entered into an unsecured line of credit (the “Line of Credit”) for $100 million with multiple banks. During July 2021 additional banks were added under the Line of Credit, and the total borrowing capacity was increased to $450 million. The Line of Credit expires on December 16, 2023, at which time the Company may request additional one-year extensions thereafter. Interest under the Line of Credit is determined based on one-month U.S. dollar-denominated LIBOR plus 3.0%. The repayment of the Line of Credit is guaranteed by the Company. As of December 31, 2020, the capacity of the unsecured Line of Credit was $100 million. There was $375 million and no outstanding borrowings on the line of credit as of December 31, 2021 and 2020, respectively.