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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities |  |  |  |
Net (loss) income |  | $ (280,484) | $ 155,293 | $ 169,776
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Net unrealized loss |  | 48,042 | 29,792 | 21,924
Stock-based compensation |  | 63,863 | 45,811 | 33,887
Depreciation and amortization |  | 261,926 | 237,129 | 199,805
Loss on sale of subsidiary |  | 46,362 | 0 | 0
Debt restructuring and debt issuance cost amortization |  | 26,196 | 9,942 | 9,674
(Benefit) provision for deferred taxes |  | (29,342) | 19,667 | 31,334
Provision for credit losses |  | 78,443 | 65,664 | 66,482
Impairment charges |  | 53,378 | 0 | 5,649
Non-cash adjustments related to tax receivable agreement |  | (491) | (932) | 775
Changes in operating assets and liabilities, net of effects of acquisitions: |  |  |  |
Accounts receivable and securitized accounts receivable |  | 592,947 | (67,645) | (201,637)
Prepaid expenses and other current and other long-term assets |  | 6,514 | 31,337 | 68,014
Accounts payable |  | (183,708) | 139,187 | (3,588)
Accrued expenses and restricted cash payable |  | 151,236 | 31,627 | 8,654
Income taxes |  | 15,083 | (12,266) | (2,107)
Other current and other long-term liabilities |  | 7,054 | (21,435) | (8,413)
Net cash provided by operating activities |  | 857,019 | 663,171 | 400,229
Cash flows from investing activities |  |  |  |
Purchases of property, equipment and capitalized software |  | (80,471) | (102,860) | (87,152)
Cash paid on sale of subsidiary |  | (22,470) | 0 | 0
Distribution (contribution) of equity investment |  | 837 | 0 |
Distribution (contribution) of equity investment |  |  |  | (2,771)
Purchases of investment securities |  | (6,459) | (5,567) | (1,768)
Maturities of investment securities |  | 181 | 230 | 266
Acquisitions, net of cash and restricted cash acquired |  | (220,704) | (882,417) | (162,750)
Net cash used for investing activities |  | (329,086) | (990,614) | (254,175)
Cash flows from financing activities |  |  |  |
Repurchase of share-based awards to satisfy tax withholdings |  | (9,519) | (10,352) | (12,372)
Proceeds from stock option exercises |  | 9,273 | 4,941 | 2,430
Net change in deposits |  | (396,065) | 176,603 | (20,360)
Net activity on other debt |  | (66,915) | (43,148) | (62,290)
Borrowings on revolving credit facility |  | 300,000 | 1,267,704 | 1,570,983
Repayments on revolving credit facility |  | (300,000) | (1,265,251) | (1,707,478)
Borrowings on term loans |  | 0 | 688,990 | 178,000
Repayments on term loans |  | (64,611) | (64,329) | (35,791)
Proceeds from issuance of convertible notes |  | 299,150 | 0 | 0
Proceeds from issuance of common stock |  | 90,000 | 0 | 0
Issuance costs |  | (17,048) | (3,442) | (5,841)
Net change in securitized debt |  | (23,521) | (1,943) | (10,009)
Net cash (used for) provided by financing activities |  | (179,256) | 749,773 | (102,728)
Effect of exchange rates on cash, cash equivalents and restricted cash |  | (405) | 4,020 | (10,680)
Net change in cash, cash equivalents and restricted cash |  | 348,272 | 426,350 | 32,646
Cash, cash equivalents and restricted cash at beginning of year | [1] | 981,381 | 555,031 | 522,385
Cash, cash equivalents and restricted cash at end of year | [1] | 1,329,653 | 981,381 | 555,031
Supplemental cash flow information |  |  |  |
Interest paid |  | 163,292 | 175,993 | 141,476
Income taxes (refunded) paid |  | (8,444) | 50,964 | 39,225
Supplemental disclosure of non-cash investing and financing activities |  |  |  |
Capital expenditures incurred but not paid |  | 3,179 | 4,771 | 8,569
Reconciliation of cash, cash equivalents and restricted cash |  |  |  |
Cash and cash equivalents at beginning of year |  | 810,932 | 541,498 | 503,519
Restricted cash at beginning of year |  | 170,449 | 13,533 | 18,866
Cash, cash equivalents and restricted cash at beginning of year | [1] | 981,381 | 555,031 | 522,385
Cash and cash equivalents at end of year |  | 852,033 | 810,932 | 541,498
Restricted cash at end of year |  | 477,620 | 170,449 | 13,533
Cash, cash equivalents and restricted cash at end of year | [1] | $ 1,329,653 | $ 981,381 | $ 555,031
[1] | The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within our consolidated balance sheets to amounts within our consolidated statements of cash flows for the years ended December 31, 2020, 2019 and 2018:
| December 31,
| 2020 |  | 2019 |  | 2018
Cash and cash equivalents at beginning of year | $ | 810,932 |  |  | $ | 541,498 |  |  | $ | 503,519 |
Restricted cash at beginning of year | 170,449 |  |  | 13,533 |  |  | 18,866 |
Cash, cash equivalents and restricted cash at beginning of year | $ | 981,381 |  |  | $ | 555,031 |  |  | $ | 522,385 |
Cash and cash equivalents at end of year | $ | 852,033 |  |  | $ | 810,932 |  |  | $ | 541,498 |
Restricted cash at end of year | 477,620 |  |  | 170,449 |  |  | 13,533 |
Cash, cash equivalents and restricted cash at end of year | $ | 1,329,653 |  |  | $ | 981,381 |  |  | $ | 555,031 |

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