Trade Receivables (Tables)

6 Months Ended

Jun. 30, 2020

Schedules of trade receivables net book value and Changes in allowance for doubtful accounts

The following table shows the breakdown in trade receivables net book value for the presented periods:


	December 31, 2019		June 30, 2020

	(in thousands)
Trade accounts receivables	$	497,800	$	363,273
(Less) Allowance for credit losses	(16,068)		(33,294)
Net book value at end of period	$	481,732	$	329,979

Changes in allowance for credit accounts are summarized below:


	2019		2020

	(in thousands)
Balance at January 1	$	(25,918)	$	(16,068)
Allowance for credit losses through retained earnings (*)	—		(3,483)
Allowance for credit losses	(6,042)		(21,040)
Reversal of provision	12,318		6,974
Currency translation adjustment	96		323
Balance at June 30	$	(19,546)	$	(33,294)

(*) From January 1, 2020, we adopted ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost issued by the Financial Accounting Standards Board (FASB). ASU 2016-13 replaces the existing incurred loss impairment model with an expected loss model which requires the use of forward-looking information to calculate credit loss estimates. This results in earlier recognition of credit losses. We adopted ASU 2016-13 effective January 1, 2020 with the cumulative effect of adoption recorded as an adjustment to retained earnings (note 1).