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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating Activities: |  |  |
Net income | $ 222,198 | $ 225,355 | $ 163,133
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 62,107 | 62,997 | 64,017
Stock-based compensation expense | 19,062 | 16,445 | 14,809
Other Operating Activities, Cash Flow Statement | (11,175) | (3,652) | 25
Interest related to uncertain tax positions | 800 | 200 | 100
Deferred income taxes | 13,205 | 9,137 | (50,396)
Changes in assets and liabilities |  |  |
Increase (Decrease) in Accounts Receivable | 11,453 | (22,934) | (112,977)
Inventories, net | (47,297) | (8,702) | (119,002)
Increase (Decrease) in Other Operating Assets | (28,785) | (4,239) | (2,829)
Accounts payable | (23,505) | (9,193) | (102,870)
Accrued payroll and benefit costs | (39,081) | 18,777 | 24,679
Other current and noncurrent liabilities | (825) | (5,656) | 64,793
Net cash provided by operating activities | 224,367 | 296,721 | 149,122
Investing Activities: |  |  |
Capital expenditures | (44,067) | (36,210) | (21,507)
Acquisition payments, net of cash acquired | (27,597) | 0 | 0
Proceeds from sale of assets | 16,795 | 12,461 | 6,766
Payments for (Proceeds from) Other Investing Activities | (5,931) | (10,393) | 9,446
Net cash used in investing activities | (60,800) | (34,142) | (5,295)
Financing Activities: |  |  |
Proceeds from (Repayments of) Short-term Debt | (29,780) | (1,454) | 11,789
Proceeds from issuance of long-term debt | 1,305,421 | 1,193,067 | 1,504,636
Repayments of long-term debt | (1,217,434) | (1,318,470) | (1,556,636)
Repurchase of common stock | (153,049) | (127,169) | (106,792)
Payment for Contingent Consideration Liability, Financing Activities | (11,401) | 0 | 0
Increase (Decrease) in Book Overdrafts | 204 | (19,857) | 8,199
Proceeds from (Payments for) Other Financing Activities | 3,727 | 1,211 | 2,392
Net cash provided (used) by financing activities | (109,766) | (275,094) | (141,196)
Effect of exchange rate on cash and cash equivalents | 758 | (9,095) | 5,191
Net change in cash and cash equivalents | 54,559 | (21,610) | 7,822
Cash and cash equivalents at the beginning of period | 96,343 | 117,953 | 110,131
Cash and cash equivalents at the end of period | 150,902 | 96,343 | 117,953
Supplemental disclosures: |  |  |
Interest Paid, Excluding Capitalized Interest, Operating Activities | 65,275 | 64,702 | 63,795
Cash paid for taxes | 64,531 | 61,983 | 65,117
Non-cash investing and financing activities: |  |  |
Payments to Acquire Equipment on Lease | $ 1,341 | $ 437 | $ 552

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