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Financial Statement Schedule I - STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Operating activities: |  |  |
Net income | $ 65,275 | $ 173,316 | $ 243,887
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 95,849 | 94,217 | 82,627
Loss on disposal of property, plant and equipment | 8,094 | 1,801 | 1,478
(Gain) loss on change in fair value of derivatives | (27,322) | 12,196 | (19,656)
Gain on repurchase of convertible notes | (2,782) |  |
Allowance for doubtful accounts | (280) | 3,673 | (8,528)
Equity in loss (earnings) of unconsolidated investees | 4,404 | 643 | (487)
Share-based compensation | 7,757 | 5,966 | 5,088
Changes in operating assets and liabilities: |  |  |
Inventories | (50,557) | 50,821 | (252,716)
Accounts receivable trade | (33,060) | (63,352) | (73,777)
Amounts due from related parties | (4,230) | (99,893) | 480
Advances to suppliers | (30,609) | 7,967 | (3,622)
Prepaid expenses and other current assets | (135,426) | 36,745 | (38,523)
Other non-current assets | (1,308) | (6,093) | (8,446)
Accounts payable | 61,157 | (23,975) | 135,812
Advances from customers | 19,710 | (30,123) | 40,311
Amounts due to related parties | (43,774) | 47,522 | (2,166)
Accrued warranty costs | (3,847) | 12,004 | 15,516
Other liabilities | (995) | 56,542 | (16,282)
Liability for uncertain tax positions | (6,037) | (1,111) | (1,613)
Deferred taxes | (95,629) | (112,263) | 9,208
Net settlement of derivatives | (1,922) | 24,878 | 17,192
Net cash provided by (used in) operating activities | (278,073) | 413,658 | 265,106
Investing activities: |  |  |
(Increase) decrease in restricted cash | 50,585 | (100,935) | (27,585)
Investment in subsidiaries | (124,737) | (84,389) | (72)
Purchase of property, plant and equipment | (286,722) | (90,905) | (49,660)
Net cash used in investing activities | (1,042,557) | (999,104) | (116,049)
Financing activities: |  |  |
Proceeds from short-term borrowings | 1,841,808 | 1,436,950 | 928,879
Repayment of short-term borrowings | (2,243,003) | (1,308,235) | (1,045,596)
Proceeds from long-term borrowings | 1,076,332 | 487,228 | 56,989
Proceeds from issuance of warrant |  | 16,378 |
Proceeds from issuance of common shares | 23,864 |  | 115,009
Issuance costs paid for common shares offering | (456) |  | (6,091)
Proceeds from issuance of convertible notes |  |  | 150,000
Payments for repurchase of convertible notes | (19,667) |  |
Proceeds from exercise of stock options | 707 | 1,867 | 3,343
Net cash provided by financing activities | 1,299,823 | 619,483 | 191,947
Effect of exchange rate changes | (12,312) | (30,501) | (19,711)
Net increase (decrease) in cash and cash equivalents | (33,119) | 3,536 | 321,293
Cash and cash equivalents at the beginning of the year | 553,079 | 549,543 | 228,250
Cash and cash equivalents at the end of the year | 511,039 | 553,079 | 549,543
Supplemental disclosure of cash flow information: |  |  |
Interest paid (net of amounts capitalized) | 70,827 | 49,619 | 47,227
Income taxes paid | 187,876 | 87,348 | 14,016
Parent Company |  |  |
Operating activities: |  |  |
Net income | 65,249 | 171,861 | 239,502
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 32 | 32 | 1
Loss on disposal of property, plant and equipment |  |  | 4
(Gain) loss on change in fair value of derivatives | (30,988) | 13,571 |
Gain on repurchase of convertible notes | (2,782) |  |
Allowance for doubtful accounts | (844) | 1,535 | 11,434
Equity in earnings of subsidiaries | (43,596) | (193,813) | (243,283)
Equity in loss (earnings) of unconsolidated investees | (50) | 273 | 280
Share-based compensation | 7,757 | 5,966 | 5,088
Changes in operating assets and liabilities: |  |  |
Inventories | 146 | 296 | (286)
Accounts receivable trade | 3,010 | 2,189 | (5,244)
Amounts due from related parties | 21,731 | 228,284 | 3,905
Advances to suppliers | 226 | (226) | (11,836)
Prepaid expenses and other current assets | 6,955 | (7,106) | (2,260)
Other non-current assets | (2,039) | (14,710) | (19,727)
Accounts payable | (4) | 3 | (9)
Advances from customers | (1,413) | 1,352 | (657)
Amounts due to related parties | (129,307) | 103,348 | (42,128)
Accrued warranty costs | (12,381) | (2,941) | 84
Other liabilities | (297) | 4,484 | 3,544
Liability for uncertain tax positions | (7,413) | (1,111) | 633
Deferred taxes | 199 | 1,451 | 1,208
Net settlement of derivatives | 17,043 | (3,950) |
Net cash provided by (used in) operating activities | (108,766) | 310,788 | (59,747)
Investing activities: |  |  |
(Increase) decrease in restricted cash | 6,512 | (6,513) |
Investment in subsidiaries |  | (116,840) | (39,668)
Purchase of property, plant and equipment |  |  | (5)
(Funding) repayment of loans to subsidiaries | 299,578 | (550,776) | (128,213)
Net cash used in investing activities | 306,090 | (674,129) | (167,886)
Financing activities: |  |  |
Proceeds from short-term borrowings |  | 10,000 |
Repayment of short-term borrowings | (190,000) |  | (12,246)
Proceeds from long-term borrowings |  | 364,680 |
Repayment of long-term borrowings |  |  | (16,393)
Proceeds from issuance of warrant |  | 16,378 |
Investment on non-controlling interest |  | (918) |
Proceeds from issuance of common shares | 23,864 |  | 115,009
Issuance costs paid for common shares offering | (456) |  | (6,090)
Proceeds from issuance of convertible notes |  |  | 150,000
Payments for repurchase of convertible notes | (19,667) |  |
Issuance cost paid on convertible notes |  |  | (5,103)
Proceeds from exercise of stock options | 707 | 1,867 | 3,342
Net cash provided by financing activities | (185,552) | 392,007 | 228,519
Effect of exchange rate changes | (24,630) | 2,085 | (27,016)
Net increase (decrease) in cash and cash equivalents | (12,858) | 30,751 | (26,130)
Cash and cash equivalents at the beginning of the year | 34,206 | 3,455 | 29,585
Cash and cash equivalents at the end of the year | 21,348 | 34,206 | 3,455
Supplemental disclosure of cash flow information: |  |  |
Interest paid (net of amounts capitalized) | $ 29,288 | $ 15,299 | 3,942
Income taxes paid |  |  | $ 736

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- Definition The amount of cash paid for interest during the period net of cash paid for interest that is capitalized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 + Details
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- Definition Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3574-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3521-108585 + Details
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- Definition Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3574-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3521-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the purchase of noncontrolling interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591551-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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