Long-term Debt

Total long-term debt as presented in the condensed consolidated balance sheets consists of the following (dollars in millions):



	June 30,		December 31,
	2011		2010
Amounts borrowed (Credit Facility)	$	76.1	$	—
Obligations under capital leases	0.7		0.8
Total long-term debt	$	76.8	$	0.8

We have a revolving credit facility (“Credit Facility”) with a capacity of $200 million. 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 borrowings. The margin added to LIBOR is a range of 175 to 225 basis points, down from a range of 275 to 350 basis points. The Fourth Amendment ties the LIBOR margin to the amount of available credit under the revolving Credit Facility, instead of the achievement of certain operating results as defined in the original agreement. At the date of signing the Fourth Amendment, we incurred fees of approximately $0.7 million, which are being amortized over the term of the amendment.

Average borrowings during the three months ended June 30, 2011 were $20.2 million, with amounts outstanding ranging from zero to $76.1 million. We did not borrow monies under the Credit Facility during the same period in 2010. The weighted-average interest rate on our revolving credit facility for the three months ended June 30, 2011 was 2.3%.

Average borrowings during the six months ended June 30, 2011 were $10.1 million, with amounts borrowed ranging from zero to $76.1 million. For the same period in 2010, average borrowings were $3.4 million, with amounts outstanding ranging from zero to $34.8 million. The weighted-average interest rate on our revolving credit facility for the six months ended June 30, 2011 and 2010 was 2.3% and 2.5%, 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. We paid total unused facility fees and letter of credit participation fees, which are included in interest expense, of $0.8 million during the six months ended June 30, 2011, compared to $0.9 million for the same period in 2010. Unamortized debt issuance costs were $2.1 million and $1.7 million as of June 30, 2011 and December 31, 2010, respectively.

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



	June 30,		December 31,
	2011		2010
Outstanding letters of credit	$	27.1	$	26.2
Amounts available to borrow	$	85.3	$	161.4

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 June 30, 2011, we were in compliance with all of the covenants under the Credit Facility.