Long-term Debt

Total long-term debt consists of the following (in millions):



	December 31,		December 31,
	2012		2011
Amounts borrowed (Credit Facility)	$	73.3	$	62.0
Obligations under capital leases	11.4		1.1
Total long-term debt	$	84.7	$	63.1

We have a revolving credit facility (“Credit Facility”) with a capacity of $200 million, which also provides for up to an additional $100 million of lenders' revolving commitments, subject to certain provisions. On May 5, 2011, we entered into a fourth amendment to our Credit Facility (the "Fourth Amendment"), which extended our Credit Facility from February 2014 to May 2016 and reduced the unused facility fees and the margin on LIBOR or CDOR borrowings. The margin added to LIBOR or CDOR is a range of 175 to 225 basis points. The Fourth Amendment ties the LIBOR or CDOR margin to the amount of available credit under the revolving Credit Facility. At the date of signing the Fourth Amendment, we incurred fees of $0.7 million, which are being amortized over the term of the amendment.

All obligations under the Credit Facility are secured by first priority liens upon substantially all of our present and future assets. The terms of the Credit Facility permit prepayment without penalty at any time (subject to customary breakage costs with respect to LIBOR or CDOR based loans prepaid prior to the end of an interest period).

The Credit Facility contains restrictive covenants, including among others, limitations on dividends and other restricted payments, other indebtedness, liens, investments and acquisitions and certain asset sales. As of December 31, 2012, we were in compliance with all of the covenants under the Credit Facility.

Amounts borrowed, outstanding letters of credit and amounts available to borrow, net of certain reserves required under the Credit Facility, were as follows (in millions):



	December 31,		December 31,
	2012		2011
Amounts borrowed	$	73.3	$	62.0
Outstanding letters of credit	19.8		23.7
Amounts available to borrow ⁽¹⁾	97.7		106.2

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(1)	Excluding $100 million expansion feature.

Average borrowings during the years ended December 31, 2012 and 2011 were $26.3 million and $21.1 million , respectively, with amounts borrowed, at any one time outstanding, ranging from zero to $91.5 million and zero to $89.5 million, respectively.

Our weighted-average interest rate was calculated based on our daily cost of borrowing, which was computed on a blend of prime and LIBOR rates. The weighted-average interest rate on our revolving credit facility for the years ended December 31, 2012 and 2011was 2.1% and 2.2%, respectively. We paid total unused facility fees and letter of credit participation fees, which are included in interest expense, of $0.9 million, $1.3 million, and $1.8 million for 2012, 2011 and 2010, respectively. Amortization of debt issuance costs is included in interest expense. Unamortized debt issuance costs were $1.5 million and $1.9 million as of December 31, 2012 and 2011, respectively.