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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Operating activities: |  |  |
Net income | $ 371,359 | $ 261,285 | $ 722,748
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation of property and equipment, including internal-use software and website development | 614,099 | 477,061 | 336,680
Amortization of stock-based compensation | 149,350 | 242,417 | 178,068
Amortization of intangible assets | 275,445 | 317,141 | 156,458
Impairment of intangible assets | 0 | 34,890 | 7,207
Deferred income taxes | (103,308) | (14,088) | (21,635)
Foreign exchange (gain) loss on cash, cash equivalents and short-term investments, net | (78,819) | 16,253 | 88,528
Realized (gain) loss on foreign currency forwards | (6,335) | 53,089 | (54,226)
Gain on sale of business | 0 | 0 | (508,810)
Non-controlling interest basis adjustment | (1,678) | 0 | (77,400)
Other | (13,660) | 7,555 | 15,865
Changes in operating assets and liabilities, net of effects from acquisitions and disposals: |  |  |
Accounts receivable | (455,668) | (276,154) | (198,262)
Prepaid expenses and other assets | (116,768) | (30,198) | 97,701
Accounts payable, merchant | 315,989 | 184,398 | 97,248
Accounts payable, other, accrued expenses and other current liabilities | 256,728 | 79,202 | 194,458
Tax payable/receivable, net | (30,577) | (100,525) | 39,776
Deferred merchant bookings | 592,912 | 261,402 | 299,534
Deferred revenue | 30,085 | 50,606 | (5,893)
Net cash provided by operating activities | 1,799,154 | 1,564,334 | 1,368,045
Investing activities: |  |  |
Capital expenditures, including internal-use software and website development | (710,330) | (749,348) | (787,041)
Purchases of investments | (1,811,355) | (45,352) | (521,329)
Sales and maturities of investments | 1,096,404 | 60,935 | 410,923
Acquisitions, net of cash acquired | (170,639) | (777) | (2,063,649)
Proceeds from sale of business, net of cash divested and disposal costs | 0 | 67,088 | 523,882
Net settlement of foreign currency forwards | 6,335 | (53,089) | 54,226
Other, net | 7,195 | 2,222 | 11,728
Net cash used in investing activities | (1,582,390) | (718,321) | (2,371,260)
Financing activities: |  |  |
Proceeds from issuance of long-term debt, net of issuance costs | 989,600 | (2,093) | 1,441,860
Payment of HomeAway Convertible Notes | 0 | (401,424) | 0
Purchases of treasury stock | (312,089) | (455,746) | (60,546)
Proceeds from issuance of treasury stock | 0 | 0 | 22,575
Payment of dividends to stockholders | (175,775) | (150,159) | (108,527)
Proceeds from exercise of equity awards and employee stock purchase plan | 229,081 | 141,043 | 97,716
Changes in controlled subsidiaries, net | (18,137) | 208,016 | (8,518)
Excess tax benefit on equity awards | 0 | 0 | 90,855
Withholding taxes for stock option exercises | (9,063) | (1,282) | (85,033)
Other, net | (16,103) | (28,974) | 13,817
Net cash provided by (used in) financing activities | 687,514 | (690,619) | 1,404,199
Effect of exchange rate changes on cash and cash equivalents | 145,640 | (34,882) | (127,385)
Net increase in cash and cash equivalents | 1,049,918 | 120,512 | 273,599
Cash and cash equivalents at beginning of year | 1,796,811 | 1,676,299 | 1,402,700
Cash and cash equivalents at end of year | 2,846,729 | 1,796,811 | 1,676,299
Supplemental cash flow information |  |  |
Cash paid for interest | 162,932 | 153,755 | 109,507
Cash paid for interest | $ 174,180 | $ 124,291 | $ 96,834

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- Definition Cash outflow in the form of ordinary dividends to common shareholders, preferred shareholders and noncontrolling interests, generally out of earnings. + 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 (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 25 -Paragraph 19A -URI http://asc.fasb.org/extlink&oid=96949009&loc=SL79513924-113897 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + 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 (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=98514028&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://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 additional borrowings, net of cash paid to third parties in connection with debt origination. + References No definition available. + Details
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- Definition This element represents the cash inflow during the period from the sale of a component of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + 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 + Details
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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 + Details
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- Definition The cash inflow associated with the sale and maturity (principal being due) of other investments, prepayment and call (request of early payment) of other investments not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the issuance of an equity stock that has been previously reacquired by the entity. + 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 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 + 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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- References No definition available. + Details
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