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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
OPERATING ACTIVITIES |  |  |
Net income | $ 255,213 | $ 176,996 | $ 137,350
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization of operating property and intangible assets | 43,570 | 40,560 | 35,796
Non-cash interest charges | 253 | 253 | 238
Provisions for losses on trade and other accounts receivable | 7,415 | 7,439 | 5,735
Gains on sales/disposals of operating property | (979) | (774) | (3,477)
Deferred income taxes, net | 2,115 | (17,031) | 6,328
Stock-based compensation | 18,256 | 7,721 | 2,747
Changes in operating assets and liabilities: |  |  |
Increase in trade and other accounts receivable | (57,419) | (181,235) | (6,233)
(Increase) decrease in other assets | (2,962) | (1,966) | 9,298
Increase (decrease) in accounts payable | 22,527 | 68,859 | (9,598)
Increase in other liabilities | 8,367 | 22,085 | 288
Increase in insurance claims | 1,545 | 16,056 | 11,770
NET CASH PROVIDED BY OPERATING ACTIVITIES | 297,901 | 138,963 | 190,242
INVESTING ACTIVITIES |  |  |
Sales and maturities of investments | 51,576 | 56,442 | 41,795
Purchases of investments | (54,041) | (58,504) | (43,529)
Purchases of operating property | (9,747) | (15,586) | (22,645)
Proceeds from sales of operating property | 4,018 | 4,032 | 10,212
Consideration paid for acquisitions |  | (8,460) |
NET CASH USED BY INVESTING ACTIVITIES | (8,194) | (22,076) | (14,167)
FINANCING ACTIVITIES |  |  |
Increase in cash overdraft | 13,097 | 5,991 | 642
Dividends paid | (88,918) | (15,938) | (14,332)
Payment for debt issue costs |  |  | (1,048)
Proceeds from exercises of stock options | 1,435 | 3,183 | 2,329
Taxes paid in lieu of shares issued related to stock-based compensation plans | (3,938) | (881) | (3,043)
Excess tax benefits from stock-based awards |  |  | 1,386
Purchases of common stock | (208,087) |  | (50,516)
Principal payments on capital lease obligations | (43,283) | (46,751) | (47,492)
Payment of contingent consideration | (985) |  |
NET CASH USED BY FINANCING ACTIVITIES | (330,679) | (54,396) | (112,074)
Effect of exchange rate changes on cash and cash equivalents | (1,708) | 1,028 | 376
(Decrease) increase in cash and cash equivalents | (42,680) | 63,519 | 64,377
Cash and cash equivalents at beginning of period | 242,416 | 178,897 | 114,520
Cash and cash equivalents at end of period | $ 199,736 | $ 242,416 | $ 178,897

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