Schedule II Valuation and Qualifying Accounts Schedule II Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2018

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule of Valuation and Qualifying Accounts [Table Text Block]

Column A	Column B		Column C					Column D		Column E
			Additions
			(1)		(2)
	Balance at the Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts					Balance at End of Period
Description								-Deductions-
					Note (A)			Note (B)
Accounts receivable — allowance for doubtful accounts:
Year ended December 31, 2018	$	15,549	$	1,167	$	(678	)	$	569	$	15,469
Year ended December 31, 2017	$	14,234	$	1,403	$	1,005		$	1,093	$	15,549
Year ended December 31, 2016	$	14,435	$	1,087	$	(760	)	$	528	$	14,234
Deferred tax valuation allowance:
Year ended December 31, 2018	$	12,857	$	—	$	3,023		$	796	$	15,084
Year ended December 31, 2017	$	10,730	$	9,513	$	72,170		$	79,556	$	12,857
Year ended December 31, 2016	$	25,435	$	—	$	—		$	14,705	$	10,730

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Note (A)

For accounts receivable, amounts comprise currency translation adjustments.

For deferred tax valuation allowance in 2018, 2017, and 2016, amounts relate primarily to changes in foreign tax credit carryforwards and R&D credit carryforwards.

Note (B)

For accounts receivable, amounts represent excess of uncollectible balances written off over recoveries of accounts previously written off.