Note 2. Long-Term Debt

Long-term debt consisted of the following:



(In thousands)	March 31, 2013			December 31, 2012
Senior notes	$	216,429		$	227,143
Revolving credit facility	—			10,000
Capitalized leases and other obligations	2,904			3,264
Total long-term debt	219,333			240,407
Less: Current maturities	(38,619		)	(38,978		)
Total maturities due after one year	$	180,714		$	201,429

We have three outstanding unsecured senior note agreements with an aggregate amount outstanding of $216.4 million and $227.1 million at March 31, 2013 and December 31, 2012, respectively. These notes call for periodic principal payments with maturities that range from 2015 to 2021, of which $35.7 million is due in the next twelve months. Interest rates on these notes are fixed and range from 4.00% to 5.85%. The weighted average interest rate on our outstanding senior note agreements was 5.09% and 5.07% at March 31, 2013 and December 31, 2012, respectively.

We have a five-year, $200.0 million senior unsecured revolving credit facility pursuant to the terms of a second amended and restated credit agreement dated August 10, 2011 (the “Credit Agreement”), with Wells Fargo Bank, National Association (“Wells Fargo”) serving as administrative agent for the lenders. Of the $200.0 million line of credit commitments, $150.0 million may be used for letters of credit and $20.0 million may be used for borrowings under the Wells Fargo Sweep Plus Loan Program. This sweep program is a daily cash management tool that automatically initiates borrowings to cover overnight cash requirements up to an aggregate of $20.0 million. In addition, we have the right to request an increase in the line of credit commitments up to a total of $300.0 million in minimum increments of $25.0 million. At our option, revolving loans under the facility bear interest at either: (a) the Applicable Margin Percentage for Base Rate Loans plus the higher of Wells Fargo’s prime rate, the federal funds rate plus 0.5% per annum, or the one month LIBOR Rate plus 1.0% per annum; (b) the LIBOR Rate plus the Applicable Margin Percentage for LIBOR Loans; or (c) the LIBOR Market Index Rate (“LIBOR Index Rate”) plus the Applicable Margin Percentage for LIBOR Market Index Loans. The Applicable Margin Percentage is determined by a pricing grid in the Credit Agreement and ranges from 1.0% to 1.875% based upon the ratio of Debt to Total Capitalization. The Applicable Margin Percentage was 1.0% and 1.125% at March 31, 2013 and December 31, 2012, respectively, and ranged from 1.0% to 1.125% during the three months ended March 31, 2013. Revolving loans under the sweep program bear interest at the LIBOR Index Rate.

There were no borrowings on our revolving credit facility at March 31, 2013 and there were $10.0 million of borrowings outstanding at December 31, 2012. There were $57.3 million and $52.4 million of outstanding letters of credit at March 31, 2013 and December 31, 2012, respectively.