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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
May 31, 2014 | May 31, 2013 | May 31, 2012
Net income | $ 28,031 | $ 27,041 | $ 22,389
Adjustments to reconcile net income to net cash provided from operating activities: |  |  |
Depreciation and amortization | 9,180 | 7,411 | 6,173
Deferred income taxes | (542) | 287 | 1,340
Share based compensation | 3,686 | 3,064 | 2,455
Excess income tax benefit from the exercise of stock options | (4,757) | (3,113) | (1,829)
Changes in operating assets and liabilities, net of business acquisitions: |  |  |
Accounts receivable | (10,602) | (2,674) | (7,204)
Inventories | (3,529) | (2,082) | (3,093)
Prepaid expenses and other current assets | (2,654) | (1,505) | 1,497
Accounts payable | 1,970 | (1,417) | 2,330
Accruals and other changes | 885 | (451) | (1,781)
Net Cash From Operating Activities | 21,668 | 26,561 | 22,277
Cash Flows Used In Investing Activities |  |  |
Purchases of property, equipment and other noncurrent assets | (11,543) | (8,897) | (12,413)
Proceeds from the sale of marketable securities | 91,207 | 67,039 | 72,270
Purchases of marketable securities | (91,691) | (82,776) | (71,631)
Business acquisitions, net of cash acquired | (39,265) | (13,318) | (4,011)
Net Cash Used In Investing Activities | (51,292) | (37,952) | (15,785)
Cash Flows From Financing Activities |  |  |
Exercise of stock options | 14,851 | 9,533 | 5,797
Excess income tax benefit from the exercise of stock options | 4,757 | 3,113 | 1,829
Decrease in other long-term liabilities | 0 | (155) | (750)
Net Cash From Financing Activities | 19,608 | 12,491 | 6,876
Effect of Exchange Rate on Cash | 659 | (113) | (167)
Net Increase (Decrease) In Cash and Cash Equivalents | (9,357) | 987 | 13,201
Cash And Cash Equivalents At Beginning of Year | 50,032 | 49,045 | 35,844
Cash And Cash Equivalents At End of Year | 40,675 | 50,032 | 49,045
Supplementary Cash Flow Information |  |  |
Income taxes paid, net of refunds | $ 9,956 | $ 8,986 | $ 6,445

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