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Fair Value of Financial Instruments and Long Term Debt (Tables) | 12 Months Ended
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Apr. 30, 2020
Fair Value Disclosures [Abstract] |
Carrying Value of Long-Term Debt | The carrying amount of the Company’s long-term debt and finance lease obligations by issuance is as follows:
| As of April 30,
| 2020 |  | 2019
Finance lease liabilities (Note 7) | $ | 16,746 |  |  | $ | 16,480 |
5.72% Senior notes due in 14 installments beginning September 30, 2012 and ending March 30, 2020 | — |  |  | 15,000 |
5.22% Senior notes due August 9, 2020 (1) | 569,000 |  |  | 569,000 |
3.67% Senior notes (Series A) due in 7 installments beginning June 17, 2022, and ending June 15, 2028 | 150,000 |  |  | 150,000 |
3.75% Senior notes (Series B) due in 7 installments beginning December 17, 2022 and ending December 18, 2028 | 50,000 |  |  | 50,000 |
3.65% Senior notes (Series C) due in 7 installments beginning May 2, 2025 and ending May 2, 2031 | 50,000 |  |  | 50,000 |
3.72% Senior notes (Series D) due in 7 installments beginning October 28, 2025 and ending October 28, 2031 | 50,000 |  |  | 50,000 |
3.51% Senior notes (Series E) due June 13, 2025 | 150,000 |  |  | 150,000 |
3.77% Senior notes (Series F) due August 22, 2028 | 250,000 |  |  | 250,000 |
| 1,285,746 |  |  | 1,300,480 |
Less current maturities (2) | 571,244 |  |  | 17,205 |
| $ | 714,502 |  |  | $ | 1,283,275 |
(1) The Company is in the process of refinancing these Senior notes, and expects to execute the applicable note purchase agreement for the refinancing in the near future shortly after the report date. (2) Long-term debt is presented gross in the table above, but net of unamortized debt issuance costs of $964 and $1,171 on the consolidated balance sheets for the years ended April 30, 2020 and 2019, respectively.
Schedule of Maturities of Long-term Debt Including Capitalized Lease Obligations | Listed below are the aggregate maturities of long-term debt, including finance lease obligations, for the 5 years commencing May 1, 2020 and thereafter:
Years ended April 30, | Finance Leases |  | Senior Notes |  | Total
2021 | $ | 2,244 |  |  | $ | 569,000 |  |  | $ | 571,244 |
2022 | 2,354 |  |  | — |  |  | 2,354 |
2023 | 2,484 |  |  | 20,000 |  |  | 22,484 |
2024 | 2,060 |  |  | 32,000 |  |  | 34,060 |
2025 | 734 |  |  | 32,000 |  |  | 32,734 |
Thereafter | 6,870 |  |  | 616,000 |  |  | 622,870 |
| $ | 16,746 |  |  | $ | 1,269,000 |  |  | $ | 1,285,746 |
Finance Lease, Liability, Maturity | Listed below are the aggregate maturities of long-term debt, including finance lease obligations, for the 5 years commencing May 1, 2020 and thereafter:
Years ended April 30, | Finance Leases |  | Senior Notes |  | Total
2021 | $ | 2,244 |  |  | $ | 569,000 |  |  | $ | 571,244 |
2022 | 2,354 |  |  | — |  |  | 2,354 |
2023 | 2,484 |  |  | 20,000 |  |  | 22,484 |
2024 | 2,060 |  |  | 32,000 |  |  | 34,060 |
2025 | 734 |  |  | 32,000 |  |  | 32,734 |
Thereafter | 6,870 |  |  | 616,000 |  |  | 622,870 |
| $ | 16,746 |  |  | $ | 1,269,000 |  |  | $ | 1,285,746 |
|  |  |  |  | April 30, 2020
Weighted-average remaining lease-term - finance lease |  |  |  | 10.9 |
Weighted-average remaining lease-term - operating lease |  |  |  | 20.4 |
Weighted-average discount rate - finance lease |  |  |  | 5.34 | %
Weighted-average discount rate - operating lease |  |  |  | 4.25 | %
Right-of-use assets obtained in exchange for new finance lease liabilities (in thousands) |  | $ | 1,520 |
Right-of-use assets obtained in exchange for new operating lease liabilities (in thousands) |  | $ | 2,840 |
Future minimum payments under the finance leases and operating leases with initial or remaining terms of one year or more consisted of the following at April 30, 2020 and April 30, 2019:
Years ended April 30, 2020 | Finance leases |  | Operating leases
2021 | $ | 3,118 |  |  | $ | 1,829 |
2022 | 3,110 |  |  | 1,814 |
2023 | 3,116 |  |  | 1,717 |
2024 | 2,565 |  |  | 1,683 |
2025 | 1,167 |  |  | 1,686 |
Thereafter | 10,764 |  |  | 25,335 |
Total minimum lease payments | 23,840 |  |  | 34,064 |
Less amount representing interest | 7,094 |  |  | 12,468 |
Present value of net minimum lease payments | $ | 16,746 |  |  | $ | 21,596 |
Years ended April 30, 2019 | Capital leases |  | Operating leases
2020 | $ | 3,103 |  |  | $ | 1,703 |
2021 | 3,109 |  |  | 1,547 |
2022 | 3,096 |  |  | 1,354 |
2023 | 3,098 |  |  | 1,228 |
2024 | 2,548 |  |  | 1,066 |
Thereafter | 9,215 |  |  | 10,438 |
Total minimum lease payments | 24,169 |  |  | $ | 17,336 |
Less amount representing interest | 7,689 |  |  |
Present value of net minimum lease payments | $ | 16,480 |  |  |

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- Definition Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + 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://fasb.org/us-gaap/role/ref/legacyRef -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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