Credit Facilities	9 Months Ended
Sep. 30, 2020
Notes To Financial Statements [Abstract]
Credit Facilities	Credit FacilityOn July 21, 2020 we entered into a new credit facility for a $300.0 million unsecured revolving line of credit, with a $50.0 million letter of credit sublimit, and a maturity date of July 21, 2023 (“2020 Credit Facility”), replacing our previous credit facility which provided for a $200.0 million revolving line of credit with a $50.0 million letter of credit. The 2020 Credit Facility requires us to comply with specific financial conditions and performance requirements. Loans under the 2020 Credit Facility bear interest, at our option, at either a rate based on the reserve adjusted LIBOR for the applicable interest period or a base rate, in each case plus a margin. The base rate is the highest of the credit facility's publicly announced prime rate, the federal funds rate plus 0.50% and one-month LIBOR plus 1.0%. The margin ranges from 1.50% to 2.25% for LIBOR loans and 0.50% to 1.25% for base rate loans. Interest on the loans is payable quarterly in arrears with respect to base rate loans and at the end of an interest period (and at three month intervals if the interest period exceeds three months) in the case of LIBOR loans. The outstanding principal, together with accrued and unpaid interest, is due on the maturity date. As of September 30, 2020, we had no outstanding borrowings under the 2020 Credit Facility and were in compliance with the conditions and performance requirements.

Credit Facilities

9 Months Ended

Sep. 30, 2020

Notes To Financial Statements [Abstract]

Credit FacilityOn July 21, 2020 we entered into a new credit facility for a $300.0 million unsecured revolving line of credit, with a $50.0 million letter of credit sublimit, and a maturity date of July 21, 2023 (“2020 Credit Facility”), replacing our previous credit facility which provided for a $200.0 million revolving line of credit with a $50.0 million letter of credit. The 2020 Credit Facility requires us to comply with specific financial conditions and performance requirements. Loans under the 2020 Credit Facility bear interest, at our option, at either a rate based on the reserve adjusted LIBOR for the applicable interest period or a base rate, in each case plus a margin. The base rate is the highest of the credit facility's publicly announced prime rate, the federal funds rate plus 0.50% and one-month LIBOR plus 1.0%. The margin ranges from 1.50% to 2.25% for LIBOR loans and 0.50% to 1.25% for base rate loans. Interest on the loans is payable quarterly in arrears with respect to base rate loans and at the end of an interest period (and at three month intervals if the interest period exceeds three months) in the case of LIBOR loans. The outstanding principal, together with accrued and unpaid interest, is due on the maturity date. As of September 30, 2020, we had no outstanding borrowings under the 2020 Credit Facility and were in compliance with the conditions and performance requirements.