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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Cash flows from operating activities: |  |  |
Net income | $ 118,917 | $ 67,983 | $ 62,738
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 99,370 | 93,706 | 93,567
Loss on disposition of fixed assets | 3,914 | 782 | 1,274
Impairment of fixed assets | 0 | 0 | 1,532
(Gain) on sale of marketable securities | 0 | (51) | 54
Unrealized (gain) loss in value of equity securities | 1,791 | (1,975) | 1,606
Deferred income taxes | 5,657 | 5,765 | 3,418
Unrealized (gain) loss in SERP | (2,641) | (135) | 1,883
Changes in operating assets and liabilities: |  |  |
Inventories | 10,782 | 950 | (1,247)
Accounts receivable and prepaid expenses | (6,804) | 2,431 | (5,874)
Accounts payable and other liabilities | 54,658 | (505) | (18,583)
Income taxes | (3,139) | 913 | 9,330
Other | (4,515) | 1,822 | 565
Net cash provided by operating activities | 277,990 | 171,686 | 150,263
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (130,991) | (101,456) | (95,696)
Proceeds from the sale of property and equipment | 470 | 4,245 | 1,734
Purchase of marketable securities | (50,789) | (13,620) | (5,627)
Proceeds from the sale and maturities of marketable securities | 7,730 | 7,165 | 12,384
Purchase of intangible assets | (127) | (1,489) | (3,540)
Change in SERP investment | (1,188) | (4,114) | (2,093)
Net cash used in investing activities | (174,895) | (109,269) | (92,838)
Cash flows from financing activities: |  |  |
Payments on long-term debt | 0 | 0 | (34,988)
Dividends paid | (33,354) | (33,354) | (32,546)
Net cash used in financing activities | (33,354) | (33,354) | (67,534)
Net increase in cash and cash equivalents | 69,741 | 29,063 | (10,109)
Cash and cash equivalents at beginning of year | 66,871 | 37,808 | 47,917
Cash and cash equivalents at end of period | $ 136,612 | $ 66,871 | $ 37,808

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