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v3.20.1

Fair Value of Financial Instruments and Long Term Debt - Carrying Value of Long-term Debt (Details) $ in Thousands | 12 Months Ended
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Apr. 30, 2020 USD ($) installment_payment | Apr. 30, 2019 USD ($) installment_payment
Debt Instrument |  |
Finance lease liabilities (Note 7) | $ 16,746 |
Finance lease liabilities (Note 7) |  | $ 16,480
Long-term debt | 1,269,000 |
Total | 1,285,746 | 1,300,480
Less current maturities (2) | 571,244 | 17,205
Long-term debt and finance lease obligations, net of current maturities | 714,502 | 1,283,275
Debt issuance costs | $ 964 | $ 1,171
Senior Notes | 5.72% Senior notes due in 14 installments beginning September 30, 2012 and ending March 30, 2020 |  |
Debt Instrument |  |
Interest rate | 5.72% | 5.72%
Number of payments | installment_payment | 14 | 14
Long-term debt | $ 0 | $ 15,000
Senior Notes | 5.22% Senior notes due August 9, 2020 (1) |  |
Debt Instrument |  |
Interest rate | 5.22% | 5.22%
Long-term debt | $ 569,000 | $ 569,000
Senior Notes | 3.67% Senior notes (Series A) due in 7 installments beginning June 17, 2022, and ending June 15, 2028 |  |
Debt Instrument |  |
Interest rate | 3.67% | 3.67%
Number of payments | installment_payment | 7 | 7
Long-term debt | $ 150,000 | $ 150,000
Senior Notes | 3.75% Senior notes (Series B) due in 7 installments beginning December 17, 2022 and ending December 18, 2028 |  |
Debt Instrument |  |
Interest rate | 3.75% | 3.75%
Number of payments | installment_payment | 7 | 7
Long-term debt | $ 50,000 | $ 50,000
Senior Notes | 3.65% Senior notes (Series C) due in 7 installments beginning May 2, 2025 and ending May 2, 2031 |  |
Debt Instrument |  |
Interest rate | 3.65% | 3.65%
Number of payments | installment_payment | 7 | 7
Long-term debt | $ 50,000 | $ 50,000
Senior Notes | 3.72% Senior notes (Series D) due in 7 installments beginning October 28, 2025 and ending October 28, 2031 |  |
Debt Instrument |  |
Interest rate | 3.72% | 3.72%
Number of payments | installment_payment | 7 | 7
Long-term debt | $ 50,000 | $ 50,000
Senior Notes | 3.51% Senior notes (Series E) due June 13, 2025 |  |
Debt Instrument |  |
Interest rate | 3.51% |
Long-term debt | $ 150,000 | 150,000
Senior Notes | 3.77% Senior notes (Series F) due August 22, 2028 |  |
Debt Instrument |  |
Interest rate | 3.77% |
Long-term debt | $ 250,000 | $ 250,000

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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