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Accounts Receivable - Changes in Reserves for Accounts Receivable (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of year	$ 46,948	$ 33,387
Provision for credit losses	32,623	27,862
Other	14,083	9,556
Charge-offs	(47,846)	(38,232)
Recoveries of amounts previously charged-off	4,628	3,505
Currency translation	139	(284)
Balance, end of period	$ 50,575	$ 35,794

X

- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Financing Receivable, Allowance for Credit Losses, Charges to Other Accounts

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