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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jul. 31, 2018 | Jul. 31, 2017
Cash flows from operating activities: |  |
Net income | $ 70,224 | $ 56,758
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 58,840 | 52,369
Stock-based compensation | 10,272 | 9,807
Loss on disposal of assets and impairment charges | 345 | 140
Deferred income taxes | 9,205 | 15,564
Changes in assets and liabilities: |  |
Receivables | (1,441) | (1,300)
Inventories | (22,211) | (24,244)
Prepaid expenses | (3,174) | 928
Accounts payable | 9,588 | (20,010)
Accrued expenses | 12,281 | 8,284
Income taxes | 8,901 | 18,899
Other, net | (2,759) | (56)
Net cash provided by operating activities | 150,071 | 117,139
Cash flows from investing activities: |  |
Purchase of property and equipment | (97,490) | (91,548)
Payments for acquisition of businesses, net of cash acquired | (841) | (3,322)
Proceeds from sales of property and equipment | 1,879 | 1,607
Net cash used in investing activities | (96,452) | (93,263)
Cash flows from financing activities: |  |
Proceeds from long-term debt | 0 | 150,000
Repayments of long-term debt | (92) | (103)
Net repayments of short-term debt | (12,189) | (900)
Proceeds from exercise of stock options | 148 | 195
Payments of cash dividends | (9,592) | (9,312)
Repurchase of common stock | (37,479) | (77,878)
Tax withholdings on employee share-based awards | (3,252) | (3,494)
Net cash (used in) provided by financing activities | (62,456) | 58,508
Net (decrease) increase in cash and cash equivalents | (8,837) | 82,384
Cash and cash equivalents at beginning of the period | 53,679 | 76,717
Cash and cash equivalents at end of the period | 44,842 | 159,101
Cash paid during the period for: |  |
Interest, net of amount capitalized | 5,205 | 4,673
Income taxes, net | 397 | 463
Noncash investing and financing activities: |  |
Purchased property and equipment in accounts payable | 4,524 | 7,752
Shares repurchased in accounts payable | $ 0 | $ 1,486

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- Definition The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
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