Debt

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Debt Disclosure

Debt

During the six months ended June 30, 2019, we made principal payments of $30.0 million on our senior secured non-recourse notes issued by Northwind Holdings, LLC.

In June 2019, we issued $400.0 million of 4.00% senior notes due 2029. The notes are callable at or above par and rank equally in the right of payment with all of our other unsecured and unsubordinated debt.

In April 2019, we amended the terms of our existing five-year unsecured revolving credit facility, increasing it from $400.0 million to $500.0 million. The credit facility, which was previously set to expire in 2021, was extended through April 2024. Under the terms of the amended agreement, we may request that the credit facility be increased up to $700.0 million, up from the previous amount of $600.0 million. We also may request, on up to two occasions, that the lenders' commitment termination dates be extended by one year. The credit facility provides for the issuance of letters of credit subject to certain terms and limitations. At June 30, 2019, letters of credit totaling $2.0 million had been issued from the credit facility, but there were no borrowed amounts outstanding.

Also in April 2019, we separately entered into a three-year, $100.0 million unsecured revolving credit facility with a different syndicate of lenders, which is set to expire in April 2022. Under the terms of the agreement, we may request that the credit facility be increased up to $140.0 million. We also may request that the lenders' commitment termination dates be extended by

one year. The credit facility provides for the issuance of letters of credit subject to certain terms and limitations. At June 30, 2019, there have been no letters of credit issued from the credit facility and there were no borrowed amounts outstanding.

Borrowings under the credit facilities are for general corporate uses and are subject to financial covenants, negative covenants, and events of default that are customary. The two primary financial covenants include limitations based on our leverage ratio and consolidated net worth. We are also subject to covenants that limit subsidiary indebtedness. The credit facilities provide for borrowings at an interest rate based either on the prime rate or LIBOR.