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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Cash flows from operating activities: |  |  |
Net income | $ (38,889) | $ 107,111 | $ 73,933
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 90,793 | 76,974 | 67,981
Stock-based compensation expense | 7,729 | 13,460 | 14,562
Deferred tax (benefit) provision | (6,783) | (23,125) | 9,725
Gain on sale of assets, net | (8,567) | (2,190) | (776)
Loss on divestitures | 6,469 | 0 | 0
Unrealized gain on investments in mutual funds | (305) | (1,304) | (2,660)
Losses from equity-method investments | 2,050 | 0 | 0
Realized loss (gain) on cost-method investments | 4,731 | (3,771) | 0
Goodwill write-down | 77,572 | 0 | 0
Changes in working capital items | (12,482) | (9,934) | 5,784
Decrease (increase) in other assets | 4,677 | (9,872) | (17,256)
Increase in other liabilities | 7,540 | 5,406 | 2,539
Other operating activities, net | (3,452) | (5,181) | (4,533)
Net cash provided by operating activities | 131,083 | 147,574 | 149,299
Cash flows from investing activities: |  |  |
Capital expenditures | (37,688) | (43,200) | (44,935)
Acquisitions, net of cash acquired | (11,504) | (121,065) | (98,235)
Proceeds from sale of assets | 13,253 | 4,705 | 3,764
Proceeds from sale of investments | 0 | 9,158 | 0
Proceeds from divestiture | 8,254 | 0 | 0
Purchases of investments | (33,074) | (11,934) | (2,211)
Net cash used in investing activities | (60,759) | (162,336) | (141,617)
Cash flows from financing activities: |  |  |
Proceeds from long-term debt | 503,693 | 704,188 | 417,043
Payments on long-term debt | (519,731) | (651,166) | (388,447)
Acquisition holdback and contingent consideration payments | (4,421) | 0 | 0
Purchases of treasury stock | (26,127) | (21,181) | (14,025)
Proceeds from the exercise of stock options | 0 | 0 | 14
Dividends | (25,620) | (24,637) | (21,762)
Other financing activities | (2,836) | (6,303) | 0
Net cash (used in) provided by financing activities | (75,042) | 901 | (7,177)
Effect of exchange rate changes on cash | (1,552) | (2,082) | 1,299
Net change in cash and cash equivalents | (6,270) | (15,943) | 1,804
Cash and cash equivalents at beginning of year | 41,572 | 57,515 | 55,711
Cash and cash equivalents at end of year | 35,302 | 41,572 | 57,515
Cash paid during the year for: |  |  |
Interest | 41,453 | 37,232 | 26,271
Income taxes | 15,467 | 11,014 | 8,472
Non-cash investing and financing activities: |  |  |
Acquisition of long-term asset under financing arrangement | $ 0 | $ 14,544 | $ 0

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- Definition The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries (generally greater than 50 percent). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 associated with the deconsolidation of a previously consolidated subsidiary or sale of an entity that is related to it but not strictly controlled. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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