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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Cash flows from operating activities: |  |
Net income | $ 18,178 | $ 53,230
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 40,276 | 36,986
Stock-based compensation expense | 5,013 | 8,132
Deferred tax benefit | (3,176) | (38,429)
Gain on sale of assets | (128) | (813)
Loss on divestiture |  | 0
Unrealized loss (gain) on investments | 806 | (199)
Changes in working capital items | (17,552) | (7,818)
Increase in other assets | (406) | (8,192)
Increase in other liabilities | 937 | 9,628
Other operating activities, net | (3,124) | 3,745
Net cash provided by operating activities | 45,289 | 56,270
Cash flows from investing activities: |  |
Capital expenditures | (19,170) | (21,854)
Acquisitions, net of cash acquired | (11,525) | (119,689)
Proceeds from sale of assets | 462 | 1,731
Proceeds from divestiture | 8,254 | 0
Investments and advances | (11,488) | (11,746)
Net cash used in investing activities | (33,467) | (151,558)
Cash flows from financing activities: |  |
Proceeds from long-term debt | 181,594 | 627,192
Payments on long-term debt | (167,327) | (495,109)
Purchases of treasury stock | (13,286) | (18,305)
Dividends | (12,860) | (12,110)
Payment of acquisition holdback | (2,050) | 0
Other financing activities | (1,436) | 0
Net cash (used in) provided by financing activities | (15,365) | 101,668
Effect of exchange rate changes on cash | (299) | 936
Net change in cash and cash equivalents | (3,842) | 7,316
Non-cash investing and financing activities: |  |
Acquisition of long-term asset under financing arrangement | $ 0 | $ 14,544

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