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Financial Statement Schedule I - STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating activities: |  |  |
Net income | $ 147,246 | $ 166,555 | $ 242,431
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 209,118 | 159,723 | 129,256
Accretion of convertible notes | 388 |  |
Loss (gain) on change in fair value of derivatives | (50,001) | 22,218 | 19,230
Share-based compensation | 12,350 | 10,682 | 10,258
Changes in operating assets and liabilities: |  |  |
Accounts receivable trade | 65,379 | 51,670 | (179,607)
Amounts due from related parties | 26,828 | (17,347) | 9,237
Prepaid expenses and other current assets | (72,188) | 33,283 | (2,208)
Other non-current assets | (11,913) | (24,037) | 9,387
Accounts payable | (89,180) | 209,175 | 47,756
Amounts due to related parties | (9,773) | (5,798) | 10,467
Liability for uncertain tax positions | (623) | (4,775) | 10,863
Net deferred tax assets | (21,439) | (12,455) | 37,591
Net settlement of derivatives | 33,054 | (27,012) | 28,731
Net cash provided by (used in) operating activities | (120,541) | 600,111 | 216,280
Investing activities: |  |  |
Net cash provided by (used in) investing activities | (319,662) | (294,102) | 29,071
Financing activities: |  |  |
Repayment of short-term borrowings | (1,561,597) | (1,649,721) | (2,368,967)
Proceeds from changes in ownership interests in subsidiaries without change of control | 261,332 | 11,488 | 10,470
(Repayment of) proceeds from convertible notes |  | (127,500) |
Proceeds from exercise of stock options | 1,035 | 875 | 769
Net cash provided by (used in) financing activities | 823,501 | (34,614) | (463,613)
Effect of exchange rate changes | 50,997 | (6,965) | (38,725)
Net increase (decrease) in cash and cash equivalents | 434,295 | 264,430 | (256,987)
Cash and cash equivalents at the beginning of the year | 1,205,420 | 940,990 | 1,190,134
Cash and cash equivalents at the end of the year | 1,639,715 | 1,205,420 | 940,990
Supplemental disclosure of cash flow information: |  |  |
Interest paid (net of amounts capitalized) | 78,747 | 85,362 | 103,236
Parent Company | Reportable Legal Entities [Member] |  |  |
Operating activities: |  |  |
Net income | 146,703 | 171,585 | 237,070
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 156 | 154 | 21
Accretion of convertible notes | 388 |  |
Loss on disposal of subsidiaries |  | 116,879 |
Loss (gain) on change in fair value of derivatives | (25,341) | 5,193 | 2,671
Allowance for credit losses | 357 | (83) | (212)
Equity in earnings of subsidiaries | (171,293) | (308,597) | (195,950)
Share-based compensation | 12,350 | 10,682 | 10,259
Changes in operating assets and liabilities: |  |  |
Amounts due from related parties | 287,865 | (43,630) | (184,755)
Prepaid expenses and other current assets | (13,183) | 17,012 | (7,778)
Other non-current assets | 28,459 | (1,158) | (149)
Amounts due to related parties | (340,502) | 183,675 | 15,598
Other current liabilities | 31,809 | (2,707) | (22,058)
Liability for uncertain tax positions | 306 | 408 | 6,008
Net deferred tax assets | (468) | (1,292) | 9,230
Net settlement of derivatives | 19,517 | (11,125) | 21,450
Net cash provided by (used in) operating activities | (22,877) | 136,996 | (108,595)
Investing activities: |  |  |
Investment in subsidiaries | (126,487) | (36,146) | (1,051)
Investments in affiliates | (2,766) | (2,483) |
Funding of loans to subsidiaries | (264,848) | (40,600) | (94,000)
Repayment of loans from subsidiaries | 20,485 | 12,809 | 375,635
Net cash provided by (used in) investing activities | (373,616) | (66,420) | 280,584
Financing activities: |  |  |
Repayment of short-term borrowings | 30,000 |  | (151,000)
Proceeds from (repayment of) long-term borrowings |  | 50,000 |
Proceeds from changes in ownership interests in subsidiaries without change of control | 224,553 |  |
(Repayment of) proceeds from convertible notes | 222,826 |  |
Payments of issuance costs on convertible notes |  | (127,500) |
Payments for repurchase of treasury stock | (5,963) | (11,845) |
Proceeds from exercise of stock options | 1,035 | 875 | 769
Net cash provided by (used in) financing activities | 472,451 | (88,470) | (150,231)
Effect of exchange rate changes | (43,246) | 11,110 | (29,618)
Net increase (decrease) in cash and cash equivalents | 32,712 | (6,784) | (7,860)
Cash and cash equivalents at the beginning of the year | 2,313 | 9,097 | 16,957
Cash and cash equivalents at the end of the year | 35,025 | 2,313 | 9,097
Supplemental disclosure of cash flow information: |  |  |
Interest paid (net of amounts capitalized) | $ 7,966 | $ 4,644 | $ 10,154

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