Note 2. Long-Term Debt

Long-term debt consisted of the following:



(In thousands)	March 31, 2016			December 31, 2015
Senior notes	$	120,000		$	120,000
Revolving credit facility	4,726			12,317
Capitalized leases and other obligations	596			1,488
Total long-term debt and capital lease obligations	125,322			133,805
Less: Current maturities	(25,596		)	(26,488		)
Total maturities due after one year	$	99,726		$	107,317

We had two outstanding unsecured senior note agreements with an aggregate amount outstanding of $120.0 million at March 31, 2016 and December 31, 2015, respectively. These notes include scheduled principal payments with maturities through 2021, of which $25.0 million is due in the next twelve months. Interest rates on these notes are fixed and range from 4.00% to 5.85%. The effective average interest rate on our outstanding senior note agreements was 4.68% at March 31, 2016 and December 31, 2015.

On December 15, 2015, we entered into an amended and restated credit agreement with Wells Fargo Bank, National Association ("Wells Fargo") serving as administrative agent for the lenders (the "2015 Credit Agreement"). The 2015 Credit Agreement provides for a five-year, $250.0 million senior unsecured revolving line of credit. We may also request an increase in the line of credit commitments up to an aggregate of $350.0 million, which may include Term Loan Commitments, in minimum increments of $25.0 million. Of the $250.0 million line of credit commitments, up to $100.0 million may be used for letters of credit and $30.0 million may be used for borrowings under the Wells Fargo Sweep Plus Loan Program (the "Sweep Program"). We utilize the Sweep Program to manage our daily cash needs, as it automatically initiates borrowings to cover overnight cash requirements primarily for working capital needs.

At our option, borrowings under the 2015 Credit Agreement bear interest at either: (i) LIBOR plus an applicable margin (based on our ratio of debt-to-total capitalization) that ranges from 1.0% to 1.50%; or (ii) a Base Rate plus an applicable margin (based on our ratio of debt-to-total capitalization) that ranges from 0.0% to 0.5%. Loans under the Sweep Program bear interest at the LIBOR plus applicable margin rate. Letter of credit fees equal to the applicable margin for LIBOR and Base Rate 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 0.125% to 0.2% (based upon the ratio of debt-to-total capitalization) are charged quarterly in arrears on the aggregate unutilized portion of the 2015 Credit Agreement. Wells Fargo, as administrative agent, also receives an annual fee for providing administrative services.

For the three months ended March 31, 2016 under the 2015 Credit Agreement, the applicable margin and letter of credit fees were 1.0% and commitment fees were 0.125%. For the three months ended March 31, 2015 under the previous credit agreement, the applicable margin and letter of credit fees were 1.0% and commitment fees were 0.175%. There were $67.7 million of outstanding letters of credit at March 31, 2016 and December 31, 2015.