Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

Three months ended March 31, 2021	U.S. Operations		Swiss Operations		Western European Operations		Chinese Operations		Other Operations		Total
Product Revenue	$	205,191	$	30,167	$	136,899	$	143,325	$	111,333	$	626,915
Service Revenue:
Point in time	51,591		6,891		35,630		9,342		27,877		131,331
Over time	15,177		2,223		19,821		3,407		5,516		46,144
Total	$	271,959	$	39,281	$	192,350	$	156,074	$	144,726	$	804,390

Three months 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

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

	2021		2020
Americas	$	303,339	$	264,824
Europe	241,377		194,828
Asia / Rest of World	259,674		189,510
Total	$	804,390	$	649,162

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:

	2021		2020
Laboratory	$	444,627	$	357,091
Industrial	310,777		252,355
Retail	48,986		39,716
Total	$	804,390	$	649,162