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v3.10.0.1

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Cash Flows from Operating Activities: |  |
Net income | $ 198,156 | $ 154,465
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 41,696 | 40,893
Benefit of deferred income taxes | 8,638 | 2,691
Share-based compensation expense | 12,352 | 11,742
Other | 1,613 | 1,031
Changes in assets and liabilities: |  |
Accounts receivable | (32,872) | (32,400)
Inventories | (16,825) | (18,850)
Other assets and liabilities | (55,781) | (21,426)
Accounts payable | 3 | 1,422
Deferred revenue | (3,252) | 1,898
Net cash provided by operating activities | 153,728 | 141,466
Cash Flows from Investing Activities: |  |
Purchases of property and equipment | (51,377) | (38,566)
Purchase of marketable securities | (87) | (175,522)
Proceeds from the sale and maturities of marketable securities | 284,125 | 155,903
Acquisitions of a business, net of cash acquired | 0 | (14,529)
Net cash provided (used) by investing activities | 232,661 | (72,714)
Cash Flows from Financing Activities: |  |
(Repayments) borrowings on revolving credit facilities, net | (218,000) | 93,000
Payment of acquisition-related contingent consideration | (1,000) | 0
Repurchases of common stock | (189,884) | (170,798)
Proceeds from exercises of stock options and employee stock purchase plans | 21,905 | 23,170
Shares withheld for statutory tax withholding on restricted stock | (8,720) | (7,459)
Net cash used by financing activities | (395,699) | (62,087)
Net effect of changes in exchange rates on cash | (3,806) | 4,409
Net (decrease) increase in cash and cash equivalents | (13,116) | 11,074
Cash and cash equivalents at beginning of period | 187,675 | 154,901
Cash and cash equivalents at end of period | $ 174,559 | $ 165,975

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