Borrowing Arrangements

12 Months Ended

Dec. 31, 2019

Bank Line of Credit

As of December 31, 2019, we have access to a $100 million bank revolving line of credit with a $25 million letter of credit sublimit that expires on October 30, 2023. As of December 31, 2019, a total of $99.1 million remains available under the facility due to $0.9 million outstanding letters of credit, which reduces the availability for letters of credit to $24.1 million. We had no borrowings outstanding on our line of credit as of December 31, 2019. Investments with a fair value of $110.1 million were pledged as collateral on the line at December 31, 2019. The securities pledged as collateral have no trading restrictions and are reported as available-for-sale securities and cash and cash equivalents as of December 31, 2019. The banks require compliance with certain covenants, which include leverage ratios and debt restrictions, for our line of credit. We are in compliance with all covenants at December 31, 2019.

Term Loan Credit Facility

In 2016, we entered into a credit agreement for a $100 million senior secured draw term loan credit facility ("Credit Facility") for the acquisition of real property and construction of an office building to serve as part of our principal headquarters. On January 1, 2019, the Credit Facility converted to a fully-amortized term loan with monthly payments of principal and interest at a fixed rate of 4.35% over a period of 28 years. Investments with a fair value of $112.4 million were pledged as collateral for the facility and are reported as available-for-sale securities and cash and cash equivalents as of December 31, 2019. The bank requires compliance with certain covenants, which include leverage ratios, debt restrictions and minimum net worth, for our Credit Facility. We are in compliance with all covenants at December 31, 2019.

The remaining unpaid balance from the Credit Facility is reported at carrying value, net of unamortized loan origination and commitment fees as long-term borrowings. See Note 5, "Fair Value" for the estimated fair value of these borrowings.

Annual principal payments

The following table sets forth future principal payments:



(in thousands)
Year		Principal payments
2020	$	1,979
2021		2,019
2022		2,109
2023		2,226
2024		2,302
Thereafter		87,445