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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |  |
Net income | $ 93,192 | $ 126,521 | $ 103,096
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 52,793 | 36,117 | 32,160
Bad debt allowance (recovery) | 1,203 | (1,000) | 862
Deferred income taxes | (19,745) | 16,246 | 732
Stock-based compensation expense | 49,045 | 32,114 | 8,091
Amortization and write-off of deferred debt issuance costs | 5,955 | 985 | 553
Change in fair value of derivative | (9,770) | (347) | 159
Change in fair value of contingent consideration | 550 | (1,340) | 62
Foreign currency remeasurement loss (gain) | 64 | (24,502) | 5,311
Loss from investment accounted for using the equity method, net of tax | 3,585 | 2,474 | 1,275
Changes in assets and liabilities, net of effect from acquisitions: |  |  |
Accounts receivable | (35,519) | 12,388 | (21,152)
Prepaid and other assets | 14,260 | 11,705 | (668)
Accounts payable, accruals, and other liabilities | 50,077 | 47,656 | 41,880
Deferred compensation plan liabilities | 92,926 | 3,706 | 3,994
Deferred revenues | 5,340 | (565) | (268)
Income taxes payable, net of prepaid income taxes | (15,932) | (3,818) | (5,314)
Net cash provided by operating activities | 288,024 | 258,340 | 170,773
Cash flows from investing activities: |  |  |
Purchases of property and equipment and investment in capitalized software | (17,539) | (16,447) | (16,639)
Acquisitions, net of cash acquired | (1,034,983) | (93,032) | (34,054)
Other investing activities | (4,081) | (7,854) | (3,000)
Net cash used in investing activities | (1,056,603) | (117,333) | (53,693)
Cash flows from financing activities: |  |  |
Proceeds from credit facilities | 745,310 | 550,875 | 191,250
Payments of credit facilities | (991,310) | (538,625) | (216,250)
Proceeds from convertible senior notes, net of discounts and commissions | 1,233,377 | 0 | 0
Payments of debt issuance costs | (5,643) | (432) | 0
Purchase of capped call options | (51,605) | 0 | 0
Proceeds from term loans | 199,505 | 125,000 | 0
Repayment of term loan | 0 | (125,000) | 0
Payments of financing leases | (197) | (189) | 0
Payments of acquisition debt and other consideration | (2,371) | (3,425) | (11,029)
Proceeds from issuance of common stock | 0 | 58,349 | 4,510
Payments of Class B Common Stock follow-on offering expenses | 0 | (1,373) | 0
Payments of dividends | (33,396) | (422,646) | (24,989)
Payments for shares acquired including shares withheld for taxes | (120,539) | (83,975) | (24,166)
Proceeds from stock purchases under employee stock purchase plan | 3,846 | 0 | 0
Proceeds from exercise of stock options | 5,605 | 9,128 | 3,626
Net cash provided by (used in) financing activities | 982,582 | (136,511) | (77,048)
Effect of exchange rate changes on cash and cash equivalents | (6,672) | (3,591) | (114)
Increase in cash and cash equivalents | 207,331 | 905 | 39,918
Cash and cash equivalents, beginning of year | 122,006 | 121,101 | 81,183
Cash and cash equivalents, end of year | 329,337 | 122,006 | 121,101
Supplemental information: |  |  |
Cash paid for income taxes | 40,203 | 28,986 | 27,907
Income tax refunds | 9,372 | 3,863 | 1,752
Interest paid | 4,631 | 8,012 | 9,221
Non-cash investing and financing activities: |  |  |
Shares issued related to acquisition | 182,390 | 0 | 0
Contingent acquisition consideration | 4,544 | 2,380 | 4,498
Deferred, non-contingent consideration, net | 10,090 | 1,416 | 0
Term loan expenses included in Accruals and other current liabilities | 45 | 0 | 0
Share-settled Executive Bonus Plan awards | 20,953 | 0 | 0
Deferred compensation plan elective participant deferrals | 2,619 | 3,530 | 3,586
Follow-On Offering |  |  |
Cash flows from financing activities: |  |  |
Proceeds from issuance of common stock | $ 0 | $ 295,802 | $ 0

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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + 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=123570139&loc=d3e3291-108585 + Details
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