Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

	U.S. Operations		Swiss Operations		Western European Operations		Chinese Operations		Other Operations		Total
Product Revenue	$	172,501	$	25,565	$	116,932	$	104,292	$	91,656	$	510,946
Service Revenue:
Point in time	47,619		4,830		34,590		7,127		24,237		118,403
Over time	9,625		2,071		13,850		2,511		3,415		31,472
Total	$	229,745	$	32,466	$	165,372	$	113,930	$	119,308	$	660,821

A summary of revenue by major geographic destination for the three months ended March 31, 2018 follows:

	2018
Americas	$	252,279
Europe	205,840
Asia / Rest of World	202,702
Total	$	660,821

The Company's global revenue mix by product category is laboratory (52% of sales), industrial (40% of sales) and retail (8% 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 summary of the Company’s revenue by product category for the three months ended March 31, 2018 is as follows:

	2018
Laboratory	$	345,159
Industrial	262,656
Retail	53,006
Total	$	660,821