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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Cash flows from operating activities |  |
Net income | $ 159,743 | $ 143,889
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 18,633 | 18,986
Amortization of intangible assets | 23,893 | 23,146
Amortization of debt issuance costs | 659 | 758
Share-based compensation expense | 12,398 | 11,603
Deferred income taxes | 2,414 | 3,669
Non-cash interest expense associated with forward starting swaps | 3,323 | 3,443
Changes in (net of effect from acquisitions): |  |
Receivables | (31,110) | (22,625)
Inventories | (4,796) | 11,386
Other current assets | (8,446) | (17,233)
Trade accounts payable | 6,469 | (3,367)
Accrued expenses | (9,799) | (12,675)
Other - net | (801) | (2,137)
Net cash flows provided by operating activities | 172,580 | 158,843
Cash flows from investing activities |  |
Additions of property, plant and equipment | (19,539) | (17,052)
Acquisition of businesses, net of cash acquired | 0 | (221,556)
Other - net | 96 | 27
Net cash flows used in investing activities | (19,443) | (238,581)
Cash flows from financing activities |  |
Borrowings under revolving facilities | 33,000 | 280,391
Payments under revolving facilities | (166,297) | (266,203)
Debt issuance costs | 0 | (92)
Dividends paid | (54,572) | (51,430)
Proceeds from stock option exercises | 12,984 | 16,934
Purchase of common stock | (9,799) | (55,971)
Unvested shares surrendered for tax withholding | (5,814) | (4,830)
Settlement of foreign exchange contracts | 4,406 | 0
Net cash flows (used in) provided by financing activities | (186,092) | 118,799
Effect of exchange rate changes on cash and cash equivalents | 15,352 | (5,591)
Net (decrease) increase in cash | (17,603) | 33,470
Cash and cash equivalents at beginning of year | 235,964 | 328,018
Cash and cash equivalents at end of period | 218,361 | 361,488
Cash paid for: |  |
Interest | 19,052 | 17,019
Income taxes - net | 50,709 | 49,142
3.20% Senior Notes, due June 2023 |  |
Cash flows from financing activities |  |
Proceeds from Senior Notes | 0 | 100,000
3.37% Senior Notes, due June 2025 |  |
Cash flows from financing activities |  |
Proceeds from Senior Notes | $ 0 | $ 100,000

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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