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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating activities: |  |  |
Net income | $ 793,560,000 | $ 266,745,000 | $ 233,290,000
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 212,405,000 | 218,984,000 | 211,779,000
Stock-based compensation expense | 98,570,000 | 62,540,000 | 69,008,000
Deferred taxes | (41,567,000) | (53,190,000) | (55,787,000)
Loss from divested operations | 0 | 0 | 2,075,000
Loss on impairment of lease related assets, net | 49,537,000 | 0 | 0
Loss on extinguishment of debt | 0 | 44,814,000 | 0
Gain on sale of an equity security | 0 | 0 | (9,120,000)
Reduction in the carrying amount of operating lease right-of-use assets | 75,125,000 | 81,851,000 | 86,466,000
Amortization and write-off of deferred financing fees | 4,162,000 | 8,424,000 | 6,497,000
Amortization of deferred swap losses from de-designation | 0 | 10,320,000 | 0
Gain on de-designated swaps | (20,204,000) | (2,157,000) | 0
Changes in assets and liabilities, net of acquisitions and divestitures: |  |  |
Fees receivable, net | (145,346,000) | 99,409,000 | (66,729,000)
Deferred commissions | (124,874,000) | 8,656,000 | (30,315,000)
Prepaid expenses and other current assets | (15,913,000) | 37,895,000 | 18,985,000
Other assets | (18,287,000) | (8,950,000) | (27,303,000)
Deferred revenues | 324,059,000 | 15,998,000 | 181,203,000
Accounts payable and accrued and other liabilities | 121,243,000 | 111,939,000 | (54,613,000)
Cash provided by operating activities | 1,312,470,000 | 903,278,000 | 565,436,000
Investing activities: |  |  |
Additions to property, equipment and leasehold improvements | (59,834,000) | (83,888,000) | (149,016,000)
Acquisitions - cash paid (net of cash acquired) | (22,939,000) | 0 | (25,989,000)
Other | 2,306,000 | 0 | 0
Proceeds from the sale of an equity security | 0 | 0 | 14,120,000
Cash used in investing activities | (80,467,000) | (83,888,000) | (160,885,000)
Financing activities: |  |  |
Proceeds from employee stock purchase plan | 18,173,000 | 18,085,000 | 17,629,000
Proceeds from borrowings | 600,000,000 | 2,000,000,000 | 5,000,000
Early redemption premium payment | 0 | (30,752,000) | 0
Payments for deferred financing fees | (7,320,000) | (25,786,000) | 0
Proceeds from revolving credit facility | 0 | 332,000,000 | 309,000,000
Payments on revolving credit facility | (5,000,000) | (475,000,000) | (316,000,000)
Payments on borrowings | (107,915,000) | (2,058,469,000) | (102,579,000)
Purchases of treasury stock | (1,655,547,000) | (176,302,000) | (199,042,000)
Cash used in financing activities | (1,157,609,000) | (416,224,000) | (285,992,000)
Net increase in cash and cash equivalents and restricted cash | 74,394,000 | 403,166,000 | 118,559,000
Effects of exchange rates on cash and cash equivalents and restricted cash | (26,375,000) | 28,581,000 | 3,614,000
Cash and cash equivalents and restricted cash, beginning of year | 712,583,000 | 280,836,000 | 158,663,000
Cash and cash equivalents and restricted cash, end of year | 760,602,000 | 712,583,000 | 280,836,000
Cash paid during the year for: |  |  |
Interest | 101,885,000 | 112,249,000 | 102,298,000
Income taxes, net of refunds received | $ 253,379,000 | $ 33,921,000 | $ 119,156,000

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