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CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 27, 2019 | Apr. 28, 2018 | Apr. 29, 2017
Cash flows from operating activities |  |  |
Net income | $ 70,141 | $ 81,595 | $ 86,984
Adjustments to reconcile net income to cash provided by operating activities |  |  |
Gain on disposal of assets | (325) | (2,108) | (224)
Gain on conversion of investment |  | (2,204) |
Gain on sale of investments | (656) | (770) | (471)
Change in deferred taxes | (1,668) | 17,261 | 569
Change in provision for doubtful accounts | 502 | 276 | (291)
Depreciation and amortization | 31,147 | 31,767 | 29,131
Stock-based compensation expense | 10,981 | 9,474 | 8,864
Pension termination charge | 32,671 |  |
Pension plan contributions | (7,000) | (2,000) | (2,300)
Change in receivables | 7,195 | (2,801) | (7,850)
Change in inventories | 3,135 | (8,009) | 12,517
Change in other assets | (7,737) | (3,245) | (1,211)
Change in accounts payable | (2,388) | 6,602 | 4,541
Change in other liabilities | 14,747 | (10,088) | 17,731
Net cash provided by operating activities | 150,745 | 115,750 | 147,990
Cash flows from investing activities |  |  |
Proceeds from disposals of assets | 1,941 | 1,440 | 761
Proceeds from property insurance | 184 | 2,087 |
Capital expenditures | (48,433) | (36,337) | (20,304)
Purchases of investments | (20,698) | (28,593) | (29,763)
Proceeds from sales of investments | 20,944 | 22,674 | 19,954
Acquisitions, net of cash acquired | (76,505) | (16,495) | (35,878)
Net cash used for investing activities | (122,567) | (55,224) | (65,230)
Cash flows from financing activities |  |  |
Payments on debt | (223) | (262) | (288)
Payments for debt issuance costs |  | (231) |
Stock issued for stock and employee benefit plans, net of shares withheld for taxes | 13,901 | 2,977 | 1,749
Excess tax benefit on stock option exercises |  |  | 1,737
Purchases of common stock | (22,957) | (56,730) | (35,957)
Dividends paid | (23,508) | (22,009) | (20,655)
Net cash used for financing activities | (32,787) | (76,255) | (53,414)
Effect of exchange rate changes on cash and equivalents | (475) | 1,741 | 178
Change in cash, cash equivalents and restricted cash | (5,084) | (13,988) | 29,524
Cash, cash equivalents and restricted cash at beginning of period | 136,871 | 150,859 | 121,335
Cash, cash equivalents and restricted cash at end of period | 131,787 | 136,871 | 150,859
Supplemental disclosure of non-cash investing activities |  |  |
Capital expenditures included in payables | $ 3,250 | $ 5,667 | $ 1,795

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