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ALLOWANCE FOR CREDIT LOSSES (Tables)

12 Months Ended

Dec. 31, 2020

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of allowances for credit losses

​

​	​	​	​	​
​	​	​	​	Advances to
​	​	Accounts Receivable	​	Suppliers and
​		Trade		Other Receivable
​		$		$
Balance as of December 31, 2017	​	32,941	​	29,111
Allowances made during the year, net	​	869	​	2,112
Accounts written-off against allowances	​	(297)	​	—
Foreign exchange effect	​	(780)	​	(593)
Balance as of December 31, 2018	​	32,733	​	30,630
Allowances made (reversed) during the year, net	​	(1,386)	​	2,657
Accounts written-off against allowances	​	(309)	​	(1,452)
Foreign exchange effect	​	(1,493)	​	(123)
Balance as of December 31, 2019	​	29,545	​	31,712
Cumulative-effect adjustment for the adoption of ASU 2016-13	​	—	​	—
Provision for credit losses, net	​	11,387	​	2,280
Writeoffs	​	(639)	​	(5,490)
Balance as of December 31, 2020	​	40,293	​	28,502

Allowances for accounts receivable, trade

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of allowances

​

​	​	​	​	​
​	​	At December 31,	​	At December 31,
​		2019		2020
​	​	$	​	$
Accounts receivable trade, gross		466,360		449,251
Allowance for credit losses		(29,545)		(40,293)
Accounts receivable trade, net		436,815		408,958

Allowances for advances to suppliers

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of allowances

​

​	​	​	​	​
​	​	At December 31,	​	At December 31,
​		2019		2020
​	​	$	​	$
Advances to suppliers, gross		109,156		299,019
Allowance for credit losses		(20,281)		(19,700)
Advances to suppliers, net		88,875		279,319

Allowances for other receivables

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of allowances

​

​	​	At December 31,	​	At December 31,
​		2019		2020
​	​	$	​	$
Other receivable, gross		181,524		238,779
Allowance for credit losses		(11,431)		(8,802)
Other receivable, net		170,093		229,977

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Tabular disclosure of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

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