Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	2020			2019
Beginning balances as of January 1	$	122,489		$	105,381
Customer pre-payments/deferred revenue	145,168			167,599
Revenue recognized	(120,291		)	(144,303		)
Foreign currency translation	(2,530		)	285
Ending balance as of March 31	$	144,836		$	128,962

Disaggregation of Revenue [Table Text Block]

For the three month ended March 31, 2020	U.S. Operations		Swiss Operations		Western European Operations		Chinese Operations		Other Operations		Total
Product Revenue	$	177,436	$	24,276	$	105,877	$	90,321	$	91,424	$	489,334
Service Revenue:
Point in time	50,234		5,557		31,391		7,106		25,676		119,964
Over time	13,739		2,064		16,057		3,172		4,832		39,864
Total	$	241,409	$	31,897	$	153,325	$	100,599	$	121,932	$	649,162

For the three month ended March 31, 2019	U.S. Operations		Swiss Operations		Western European Operations		Chinese Operations		Other Operations		Total
Product Revenue	$	174,256	$	26,665	$	116,555	$	111,416	$	95,455	$	524,347
Service Revenue:
Point in time	49,651		4,951		33,939		7,704		24,018		120,263
Over time	10,743		1,961		15,412		2,603		4,123		34,842
Total	$	234,650	$	33,577	$	165,906	$	121,723	$	123,596	$	679,452

A breakdown of net sales to external customers by geographic customer destination for the three months ended March 31 follows:

	2020		2019
Americas	$	264,824	$	258,631
Europe	194,828		209,555
Asia / Rest of World	189,510		211,266
Total	$	649,162	$	679,452

The Company's global revenue mix by product category is laboratory (55% of sales), industrial (39% of sales) and retail (6% of sales). The Company's product revenue by reportable segment is proportionately similar to the Company's global mix except the Company's Swiss Operations is largely comprised of laboratory products, while the Company's Chinese Operations has a slightly higher percentage of industrial products. A breakdown of the Company’s sales by product category for the three months ended March 31 follows:

	2020		2019
Laboratory	$	357,091	$	359,732
Industrial	252,355		271,320
Retail	39,716		48,400
Total	$	649,162	$	679,452