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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Cash flows from operating activities |  |
Net income | $ 223,477 | $ 206,084
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 19,870 | 19,957
Amortization of intangible assets | 17,953 | 20,667
Amortization of debt issuance expenses | 669 | 664
Share-based compensation expense | 14,413 | 13,252
Deferred income taxes | 10,685 | (3,021)
Non-cash interest expense associated with forward starting swaps | 3,171 | 3,259
Changes in (net of the effect from acquisitions): |  |
Receivables | (14,177) | (40,044)
Inventories | (21,007) | (28,011)
Other current assets | (12,382) | 17,798
Trade accounts payable | 17,276 | 5,432
Accrued expenses | (39,602) | (21,131)
Other - net | (508) | (2,480)
Net cash flows provided by operating activities | 219,838 | 192,426
Cash flows from investing activities |  |
Purchases of property, plant and equipment | (25,742) | (20,968)
Purchase of intellectual property | 0 | (4,000)
Proceeds from disposal of fixed assets | 780 | 0
Other - net | 501 | (861)
Net cash flows used in investing activities | (24,461) | (25,829)
Cash flows from financing activities |  |
Dividends paid | (71,283) | (61,916)
Proceeds from stock option exercises | 20,761 | 13,616
Repurchases of common stock | (54,668) | (19,499)
Shares surrendered for tax withholding | (11,509) | (10,750)
Settlement of foreign exchange contracts | 0 | 6,593
Other - net | (1,929) | 0
Net cash flows used in financing activities | (118,628) | (71,956)
Effect of exchange rate changes on cash and cash equivalents | 33 | (11,840)
Net increase in cash | 76,782 | 82,801
Cash and cash equivalents at beginning of year | 466,407 | 375,950
Cash and cash equivalents at end of period | 543,189 | 458,751
Cash paid for: |  |
Interest | 18,282 | 18,223
Income taxes | 55,702 | 38,190
Significant non-cash activities: |  |
Capital expenditures for construction of new leased facility | $ 0 | $ 11,971

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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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