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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Cash flows from operations: |  |  |
Net income | $ 220,816 | $ 212,182 | $ 180,160
Adjustments to reconcile net income to net cash provided by operations: |  |  |
Depreciation and amortization of property, plant, equipment and capitalized software | 51,884 | 55,769 | 58,404
Amortization of intangible assets | 10,308 | 12,208 | 13,377
Deferred income taxes | 6,721 | 4,762 | 5,652
Stock compensation expense | 20,238 | 21,365 | 18,751
Gain on sale of business | 0 | (650) | (6,880)
Changes in assets and liabilities, net of effects of business combinations: |  |  |
Accounts receivable—billed and billable | 34,033 | 53,025 | (51,986)
Accounts receivable—unbilled | 4,920 | 26 | (5,590)
Prepaid expenses and other current assets | 4,954 | 2,584 | (2,027)
Deferred contract costs | 1,838 | 2,037 | (398)
Accounts payable and accrued liabilities | (7,725) | (28,309) | (2,371)
Accrued compensation and benefits | (8,795) | 8,849 | (869)
Deferred revenue | (27,039) | (15,401) | (11,661)
Income taxes | 7,262 | 8,901 | (13,125)
Other assets and liabilities | 4,110 | (148) | (1,411)
Cash provided by operations | 323,525 | 337,200 | 180,026
Cash flows from investing activities: |  |  |
Purchases of property and equipment and capitalized software costs | (26,520) | (24,154) | (46,391)
Acquisition of businesses, net of cash acquired | 0 | (2,677) | (46,651)
Acquisition of part of noncontrolling interest | (157) | 0 | 0
Proceeds from the sale of a business | 0 | 1,035 | 5,515
Purchases of short-term investments | (19,996) | 0 | 0
Other | 369 | 575 | 424
Cash used in investing activities | (46,304) | (25,221) | (87,103)
Cash flows from financing activities: |  |  |
Cash dividends paid to MAXIMUS shareholders | (11,692) | (11,674) | (11,701)
Repurchases of common stock | (66,919) | (28,863) | (33,335)
Tax withholding related to RSU vesting | (8,529) | (9,175) | (11,614)
Borrowings under credit facility | 136,632 | 185,000 | 149,823
Repayment of credit facility and other long-term debt | (136,769) | (349,981) | (195,200)
Stock option exercises | 0 | 924 | 546
Stock compensation tax benefit | 0 | 0 | 5,172
Other | (4,603) | (1,660) | (533)
Cash used in financing activities | (91,880) | (215,429) | (96,842)
Effect of exchange rate changes on cash | (2,348) | 3,503 | (4,554)
Net increase/(decrease) in cash and cash equivalents | 182,993 | 100,053 | (8,473)
Cash and cash equivalents, beginning of period | 166,252 | 66,199 | 74,672
Cash and cash equivalents, end of period | $ 349,245 | $ 166,252 | $ 66,199

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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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