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Long-Term Debt and Capital Leases (Tables) | 12 Months Ended
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Apr. 30, 2013
Components of Long Term Debt and Capital Leases | Long-term debt and capital leases as of April 30, 2013 and 2012 consist of the following:
|  | April 30, |
|  | 2013 |  |  | 2012 |
Senior subordinated notes due February 15, 2019, bearing interest at 7.75%, interest payable semiannually, unsecured and unconditionally guaranteed (including unamortized discount of $1,735 and $0) |  | $ | 323,265 |  |  | $ | 200,000 |
Senior secured revolving credit facility, which provides for advances or letters of credit of up to $227,500, due March 18, 2016, bearing interest at LIBOR plus 3.75%, (approximately 3.95% at April 30, 2013 based on one month LIBOR), secured by substantially all of our assets |  |  | 123,200 |  |  |  | 69,600 |
Senior second lien notes, due July 15, 2014 and redeemed on November 8, 2012, bearing interest at 11.00%, interest payable semiannually, secured by second priority lien on substantially all of our assets (including unamortized discount of $0 and $2,572) |  |  | - |  |  |  | 177,428 |
Finance authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-2 due January 1, 2025, dated February 1, 2012, bearing interest at 6.25% through January 31, 2017, unsecured and guaranteed by our significant wholly-owned subsidiaires |  |  | 21,400 |  |  |  | 21,400 |
Vermont Economic Development Authority Solid Waste Disposal Long-Term Revenue Bonds Series 2013 due April 1, 2036, dated March 1, 2013, bearing interest at 4.75% through April 4, 2019, unsecured and guaranteed by our significant wholly-owned subsidiaires |  |  | 16,000 |  |  |  | - |
Business Finance Authority of the State of New Hampshire Solid Waste Disposal Revenue Bonds Series 2013 due April 1, 2029, dated March 1, 2013, bearing interest at BMA Index (approximately 0.28% at April 30, 2013) enhanced by an irrevocable, transferable direct-pay letter of credit (3.875% at April 30, 2013) |  |  | 5,500 |  |  |  | - |
Finance Authority of Maine Solid Waste Disposal Revenue Bonds Series 2005R-1 due January 1, 2025, dated December 1, 2005, bearing interest at BMA Index (approximately 0.28% at April 30, 2013) enhanced by an irrevocable, transferable direct-pay letter of credit (3.875% at April 30, 2013) |  |  | 3,600 |  |  |  | 3,600 |
Notes payable in connection with businesses acquired, bearing interest at rates of 2.49% - 6.50%, due in monthly or annual installments varying to $575, maturing May 2013 through April 2017 |  |  | 1,228 |  |  |  | 2,033 |
Capital leases for facilities and equipment, bearing interest rates of up to 4.72%, due in monthly or annual installments varying to $78, expiring through January 2015 |  |  | 195 |  |  |  | 548 |
|  |  | 494,388 |  |  |  | 474,609 |
Less—current maturities |  |  | 857 |  |  |  | 1,228 |
|  | $ | 493,531 |  |  | $ | 473,381 |
Components of Interest Expense | The components of interest expense for the fiscal years ended April 30, 2013, 2012 and 2011 are as follows:
|  | Fiscal Year Ended April 30, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Interest expense on debt, capital lease and financing lease obligations |  | $ | 36,955 |  |  | $ | 40,156 |  |  | $ | 42,021 |
Amortization of debt financing costs |  |  | 3,325 |  |  |  | 3,307 |  |  |  | 3,424 |
Amortization of debt discounts |  |  | 626 |  |  |  | 964 |  |  |  | 801 |
Amortization of debt premium |  |  | - |  |  |  | - |  |  |  | (611 | )
Letter of credit fees |  |  | 1,032 |  |  |  | 988 |  |  |  | 986 |
Less: capitalized interest |  |  | (368 | ) |  |  | (407 | ) |  |  | (1,078 | )
Total interest expense |  | $ | 41,570 |  |  | $ | 45,008 |  |  | $ | 45,543 |
Schedule of Future Maturities of Debt | As of April 30, 2013, debt and capital leases mature as follows:
2014 |  | $ | 857 |
2015 |  |  | 328 |
2016 |  |  | 123,410 |
2017 |  |  | 28 |
2018 |  |  | - |
Thereafter (1) |  |  | 369,765 |
|  | $ | 494,388 |
(1) | Includes unamortized discount of $1,735 on 2019 Notes.

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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