	December 31,
(In thousands)	2019		2018
Senior notes	$	45,000	$	45,000
Revolving credit facility		—		—
Total long-term debt		45,000		45,000
Less: Current maturities		—		—
Total maturities due after one year	$	45,000	$	45,000

We have one unsecured senior note agreement with an amount outstanding of $45.0 million at December 31, 2019 and 2018. The agreement calls for a scheduled principal payment of $45.0 million, with an interest rate of 4.79%, on January 3, 2021.

On November 21, 2019, we entered into a second amended and restated credit agreement with Wells Fargo Bank, National Association serving as administrative agent for the lenders (the “Credit Agreement”). The Credit Agreement provides for a five-year, $250.0 million senior unsecured revolving line of credit and a $150.0 million accordion feature, which if fully exercised and approved, would expand the total borrowing capacity up to an aggregate of $400.0 million. Of the $250.0 million line of credit commitments under the Credit Agreement, up to $100.0 million may be used for letters of credit.

At our option, borrowings under the Credit Agreement bear interest at either: (i) LIBOR (including applicable successor provisions) plus an applicable margin (based on our ratio of net debt-to-total capitalization) that ranges from 1.000% to 1.375%; or (ii) a Base Rate plus an applicable margin (based on our ratio of net debt-to-total capitalization) that ranges from 0.000% to 0.375%. Letter of credit fees equal to the applicable margin for LIBOR loans are charged quarterly in arrears on the daily average aggregate stated amount of all letters of credit outstanding during the quarter. Commitment fees ranging from 0.100% to 0.175% (based upon the ratio of net debt-to-total capitalization) are charged quarterly in arrears on the aggregate unutilized portion of the Credit Agreement.

For periods covered under the Credit Agreement, the applicable margin on LIBOR loans and letter of credit fees were 1.000% and commitment fees were 0.100%.

The Credit Agreement replaced our previous five-year, $300.0 million senior unsecured revolving credit agreement dated as of December 15, 2015, as amended on September 9, 2016 (the “Prior Credit Agreement”). For periods in 2019 and 2018 covered under the Prior Credit Agreement, the applicable margin on LIBOR loans and letter of credit fees were 1.000% and commitment fees were 0.125%.

There were $48.9 million and $61.5 million of outstanding letters of credit at December 31, 2019 and 2018, respectively.

The Credit Agreement includes a provision limiting our ability to make restricted payments, including dividends and payments for share repurchases, unless, among other conditions, no defaults or events of default under the Credit Agreement are ongoing (or would be caused by such restricted payment). Our senior note agreement and Credit Agreement contain customary covenants, including financial covenants that require us to observe a maximum ratio of debt to total capital and a minimum fixed charge coverage ratio. Any future wholly-owned material domestic subsidiaries of the Company would be required to guarantee payment of all of our obligations under these agreements.