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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
May. 31, 2015 | May. 31, 2014 | May. 31, 2013
Cash Flows From Operating Activities |  |  |
Net Income | $ 33,576 | $ 28,031 | $ 27,041
Adjustments to reconcile net income to net cash provided from operating activities: |  |  |
Depreciation and amortization | 10,649 | 9,180 | 7,411
Deferred income taxes | 496 | (542) | 287
Share based compensation | 4,450 | 3,686 | 3,064
Excess income tax benefit from the exercise of stock options | (2,475) | (4,757) | (3,113)
Changes in operating assets and liabilities, net of business acquisitions: |  |  |
Accounts receivable | (7,252) | (10,602) | (2,674)
Inventories | 319 | (3,529) | (2,082)
Prepaid expenses and other current assets | 3,264 | (2,654) | (1,505)
Accounts payable | 412 | 1,970 | (1,417)
Accruals and other changes | 353 | 885 | (451)
Net Cash From Operating Activities | 43,792 | 21,668 | 26,561
Cash Flows For Investing Activities |  |  |
Purchases of property, equipment and other noncurrent assets | (9,619) | (11,543) | (8,897)
Proceeds from the sale of marketable securities | 93,662 | 91,207 | 67,039
Purchases of marketable securities | (105,944) | (91,691) | (82,776)
Business acquisitions, net of cash acquired | (6,554) | (39,265) | (13,318)
Net Cash For Investing Activities | (28,455) | (51,292) | (37,952)
Cash Flows From Financing Activities |  |  |
Exercise of stock options | 8,558 | 14,851 | 9,533
Excess income tax benefit from the exercise of stock options | 2,475 | 4,757 | 3,113
Decrease in other long-term liabilities | 0 | 0 | (155)
Net Cash From Financing Activities | 11,033 | 19,608 | 12,491
Effect of Exchange Rate on Cash | (984) | 659 | (113)
Net Increase (Decrease) In Cash and Cash Equivalents | 25,386 | (9,357) | 987
Cash And Cash Equivalents At Beginning of Year | 40,675 | 50,032 | 49,045
Cash And Cash Equivalents At End of Year | 66,061 | 40,675 | 50,032
Supplementary Cash Flow Information |  |  |
Income taxes paid, net of refunds | $ 10,454 | $ 9,956 | $ 8,986

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