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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Cash flows from operating activities: |  |  |  |
Net earnings | $ 76,086 | [1] | $ 104,476 | $ 107,735
Adjustments to reconcile net earnings to net cash provided by operating activities: |  |  |  |
Depreciation and amortization | 60,036 |  | 42,764 | 37,226
Costs recognized on sale of acquired inventory | 3,037 |  | 5,431 | 6,961
Deferred income taxes | (3,433) |  | (2,624) | 1,304
Stock-based compensation expense | 14,631 |  | 9,430 | 5,957
Gain on sale of CyVek |  |  |  | (8,300)
Fair value adjustment to contingent consideration payable | 18,400 |  |  |
Contingent consideration and ACD compensation, operating | (13,322) |  |  |
Other operating activity | 1,942 |  | (566) | (157)
Change in operating assets and liabilities, net of acquisitions: |  |  |  |
Trade accounts and other receivables | (19,686) |  | (22,981) | (11,747)
Inventories | (732) |  | (6,626) | (4,714)
Prepaid expenses | (2,088) |  | (381) | (620)
Trade accounts payable and accrued expenses | 5,695 |  | 8,924 | 2,154
Salaries, wages and related accruals | 2,183 |  | 5,725 | 1,679
Income taxes payable | 699 |  | 298 | 1,881
Net cash provided by operating activities | 143,448 |  | 143,870 | 139,359
Cash flows from investing activities: |  |  |  |
Purchase of available-for-sale investments | (3,069) |  |  |
Proceeds from sale and maturities of available-for-sale investments | 6,079 |  | 776 | 13,466
Additions to property and equipment | (15,179) |  | (16,898) | (19,905)
Acquisitions, net of cash acquired | (253,785) |  | (91,423) | (420,102)
Investment in unconsolidated entity | (40,000) |  |  |
Other investing activities |  |  | (25) | 49
Net cash used in investing activities | (305,954) |  | (107,570) | (426,492)
Cash flows from financing activities: |  |  |  |
Cash dividends | (47,325) |  | (47,607) | (47,107)
Proceeds from stock option exercises | 5,257 |  | 5,458 | 9,731
Excess tax benefit from stock option exercises | 514 |  | 566 | 615
Borrowings under line-of-credit agreement | 368,500 |  | 77,000 | 163,000
Payments on line-of-credit | (116,500) |  | (58,500) | (94,964)
Contingent consideration and ACD compensation, financing | (21,060) |  |  |
Net cash provided by (used in) financing activities | 189,386 |  | (23,083) | 31,275
Effect of exchange rate changes on cash and cash equivalents | 495 |  | (3,512) | (8,178)
Net change in cash and cash equivalents | 27,375 |  | 9,705 | (264,036)
Cash and cash equivalents at beginning of year | 64,237 |  | 54,532 | 318,568
Cash and cash equivalents at end of year | $ 91,612 |  | $ 64,237 | $ 54,532
[1] | During the fourth quarter, management identified certain errors related to purchase accounting items for the ACD acquisition recorded during the first quarter of fiscal year 2017. These items impact the cost recognized upon the sale of acquired inventory, other acquisition related costs recorded within selling, general and administrative costs, and income taxes and resulted in a favorable impact to previously reported quarterly results as outlined in the table below.

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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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