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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
OPERATING ACTIVITIES: |  |
Net income | $ 35,663 | $ 20,388
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 83,053 | 62,281
Non-cash impairment charges | 4,941 | 3,290
Deferred income tax | 789 | (935)
Amortization of debt issuance costs | 4,953 | 1,178
Realized loss on sale of short-term investment | 0 | 2,287
Loss on disposal of property and equipment | 969 | 443
Change in fair value of contingent consideration and other | 1,214 | (2,773)
Share-based compensation | 15,786 | 16,359
Changes in assets and liabilities, net of business acquisitions: |  |
Accounts receivable | 1,180 | (9,861)
Inventories | (3,441) | (862)
Prepaid expenses and other current assets | 3,432 | (14,691)
Other non-current assets | (1,397) | (1,977)
Accounts payable, accrued expenses and other current liabilities | 9,418 | 24,021
Deferred revenue | (111) | 1,405
Other non-current liabilities | 546 | 2,442
Net cash provided by operating activities | 156,995 | 102,995
INVESTING ACTIVITIES: |  |
Purchases of property and equipment | (52,056) | (29,806)
Proceeds from sale of short-term investments | 0 | 16,951
Proceeds from note receivable | 679 | 483
Proceeds from sale of property and equipment | 298 | 157
Cash provided by business acquisitions | 26,704 |
Cash used in business acquisitions |  | (225,552)
Net cash used in investing activities | (24,375) | (237,767)
FINANCING ACTIVITIES: |  |
Borrowings under senior credit facility | 50,000 | 571,383
Repayments under senior credit facility | (460,000) | (65,000)
Payment of debt issuance costs | (4,388) | 0
Proceeds from the issuance of common stock, net of issuance costs | 349,590 | 0
Net cash paid for financing liabilities from business acquisitions | (33,843) | (4,661)
Proceeds from exercised stock options | 9,239 | 9,774
Cash taxes paid in net equity settlement | (7,415) | (6,763)
Net cash (used in) provided by financing activities | (96,817) | 504,733
Effect of exchange rate changes on cash and cash equivalents | (4,747) | 9,927
Net increase in cash and cash equivalents | 31,056 | 379,888
Cash and cash equivalents at beginning of period | 174,935 | 102,055
Cash and cash equivalents at end of period | $ 205,991 | $ 481,943

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- Definition The cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation. + 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 (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the 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 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition Cash inflow representing an adjustment to the purchase price of a previous acquisition. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + 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=109223946&loc=d3e3179-108585 + 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://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=109197908&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=109223946&loc=d3e3255-108585 + Details
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- Definition The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt. + 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 (b) -URI http://asc.fasb.org/extlink&oid=109223946&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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