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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Cash flows from operating activities: |  |
Net income | $ 38,466 | $ 37,007
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |
Depreciation | 10,699 | 9,148
Amortization of intangible assets | 4,893 | 2,593
Loss on investments in privately held companies | 13 | 259
Share-based compensation expense | 13,259 | 10,705
Deferred income taxes | (9,659) | (9,879)
Change in fair value of contingent consideration for business acquisition | 0 | (1,978)
Other | 124 | (3)
Changes in assets and liabilities, net of acquisitions: |  |
Accounts receivable, net | (68,557) | (35,702)
Inventories | (18,200) | (20,389)
Other assets | (4,225) | (3,088)
Accounts payable | 51,188 | 38,647
Accrued and other liabilities | (5,719) | (28,203)
Net cash provided by (used in) operating activities | 12,282 | (883)
Cash flows from investing activities: |  |
Purchases of property, plant and equipment | (8,744) | (10,035)
Investment in privately held companies | (225) | (360)
Acquisitions, net of cash acquired | (243) | 0
Purchases of trading investments | (2,500) | (609)
Proceeds from sales of trading investments | 2,867 | 647
Net cash used in investing activities | (8,845) | (10,357)
Cash flows from financing activities: |  |
Purchases of registered shares | (9,982) | (624)
Proceeds from exercises of stock options | 1,104 | 12,569
Tax withholdings related to net share settlements of restricted stock units | (25,081) | (21,683)
Net cash used in financing activities | (33,959) | (9,738)
Effect of exchange rate changes on cash and cash equivalents | (7,309) | 1,102
Net decrease in cash and cash equivalents | (37,831) | (19,876)
Cash and cash equivalents , beginning of the period | 641,947 | 547,533
Cash and cash equivalents , end of the period | 604,116 | 527,657
Non-cash investing activities: |  |
Property, plant and equipment purchased during the period and included in period end liability accounts | $ 4,831 | $ 3,713

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