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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2020 | Apr. 30, 2019 | Apr. 30, 2018
Cash flows from operating activities: |  |  |
Net income | $ 107,017 | $ 104,796 | $ 135,897
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 55,311 | 46,489 | 48,588
Stock-based compensation expense | 22,818 | 23,385 | 21,469
Tradename write-offs |  | 106,555 |
Write-off of long-lived assets | 2,654 |  |
Provision for doubtful accounts | 14,644 | 14,260 | 13,675
Gain on cash surrender value of life insurance policies | (6,551) | (6,160) | (7,776)
Loss (gain) on marketable securities | 2,066 | (8,134) | (10,278)
Deferred income taxes | (9,330) | (27,796) | (6,564)
Change in other assets and liabilities: |  |  |
Deferred compensation | 23,496 | 18,478 | 27,660
Receivables due from clients | 34,152 | (30,625) | (53,357)
Income taxes and other receivables | (6,421) | 1,409 | 2,093
Prepaid expenses and other assets | (956) | (148) | (2,118)
Unearned compensation | 300 | (7,299) | (42,742)
Income taxes payable | 1,246 | 213 | 32,439
Accounts payable and accrued liabilities | (6,011) | 28,398 | 66,081
Other | 1,914 | (5,016) | (5,942)
Net cash provided by operating activities | 236,349 | 258,805 | 219,125
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (41,460) | (46,682) | (42,000)
Purchase of marketable securities | (83,563) | (9,476) | (9,462)
Proceeds from sales/maturities of marketable securities | 47,936 | 13,781 | 2,642
Cash paid for acquisition, net of cash acquired | (108,602) |  |
Premium on company-owned life insurance policies | (15,699) | (34,862) | (1,614)
Proceeds from life insurance policies | 2,280 | 7,632 | 5,355
Dividends received from unconsolidated subsidiaries | 346 | 140 | 240
Net cash used in investing activities | (198,762) | (69,467) | (44,839)
Cash flows from financing activities: |  |  |
Proceeds from long term debt | 1,045,500 | 226,875 |
Principal payments on long term debt | (876,875) | (238,906) | (20,625)
Payment of debt issuance costs | (3,050) | (2,181) |
Repurchases of common stock | (92,446) | (37,372) | (33,071)
Payments of tax withholdings on restricted stock | (8,993) | (20,698) | (3,794)
Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan | 7,684 | 7,272 | 6,885
Borrowings under life insurance policies |  | 31,870 |
Payments on life insurance policy loans | (943) | (5,316) | (554)
Principal payments on finance leases | (1,833) |  |
Dividends paid to shareholders | (22,798) | (23,459) | (22,955)
Dividends - noncontrolling interest | (2,110) | (2,255) | (2,659)
Payment of contingent consideration from acquisitions | (455) | (455) | (485)
Net cash provided by (used in) financing activities | 43,681 | (64,625) | (77,258)
Effect of exchange rate changes on cash and cash equivalents | (18,384) | (19,201) | 12,938
Net increase in cash and cash equivalents | 62,884 | 105,512 | 109,966
Cash and cash equivalents at beginning of year | 626,360 | 520,848 | 410,882
Cash and cash equivalents at end of the period | 689,244 | 626,360 | 520,848
Supplemental cash flow information: |  |  |
Cash used to pay interest | 12,526 | 14,188 | 11,946
Cash used to pay income taxes, net of refunds | $ 54,914 | $ 58,408 | $ 37,486

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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests. + 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 (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition Amount of cash outflow for payment of premium on corporate-owned life insurance policy, classified as investing activities. Includes, but is not limited to, bank-owned life insurance policy. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21C -URI http://asc.fasb.org/extlink&oid=118932676&loc=SL94080552-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition Amount of cash outflow for purchase of marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21D -URI http://asc.fasb.org/extlink&oid=118932676&loc=SL94080555-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the 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 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow for proceeds from settlement of corporate-owned life insurance policy, classified as investing activities. Includes, but is not limited to, bank-owned life insurance policy. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21C -URI http://asc.fasb.org/extlink&oid=118932676&loc=SL94080552-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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