Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,029,699	$ 954,535	$ 2,896,664	$ 2,827,234
Contract with Customer, Asset, after Allowance for Credit Loss	43,200		43,200		$ 32,600
Americas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	431,522	393,620	1,223,530	1,181,992
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	292,862	259,993	814,940	792,690
Asia [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	305,315	300,922	858,194	852,552
Product [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	766,648	715,593	2,150,842	2,128,821
Service [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	191,291	171,681	532,170	507,550
Service [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 71,760	67,261	$ 213,652	190,863
Laboratory products and services [Member]
Disaggregation of Revenue [Line Items]
Percentage of Disaggregated Revenue in Relationship to Segments	55.00%		55.00%
Revenue from Contract with Customer, Excluding Assessed Tax	$ 564,767	534,835	$ 1,602,907	1,583,123
Industrial products and services [Member]
Disaggregation of Revenue [Line Items]
Percentage of Disaggregated Revenue in Relationship to Segments	40.00%		40.00%
Revenue from Contract with Customer, Excluding Assessed Tax	$ 406,395	365,514	$ 1,142,223	1,091,616
Retail products and services [Member]
Disaggregation of Revenue [Line Items]
Percentage of Disaggregated Revenue in Relationship to Segments	5.00%		5.00%
Revenue from Contract with Customer, Excluding Assessed Tax	$ 58,537	54,186	$ 151,534	152,495
US Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	385,850	351,042	1,104,124	1,059,380
US Operations [Member] \| Product [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	278,252	253,663	797,101	768,744
US Operations [Member] \| Service [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	80,158	72,240	227,822	219,213
US Operations [Member] \| Service [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	27,440	25,139	79,201	71,423
Swiss Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	52,072	53,435	148,929	157,870
Swiss Operations [Member] \| Product [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	39,832	42,311	113,592	125,350
Swiss Operations [Member] \| Service [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8,800	7,969	25,780	23,348
Swiss Operations [Member] \| Service [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,440	3,155	9,557	9,172
Western European Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	227,176	201,837	629,461	618,915
Western European Operations [Member] \| Product [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	152,897	135,271	417,320	423,919
Western European Operations [Member] \| Service [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	48,323	43,250	137,462	129,289
Western European Operations [Member] \| Service [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	25,956	23,316	74,679	65,707
Chinese Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	166,964	164,400	470,149	471,982
Chinese Operations [Member] \| Product [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	150,526	147,851	425,358	425,298
Chinese Operations [Member] \| Service [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	11,795	11,852	31,530	33,506
Chinese Operations [Member] \| Service [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,643	4,697	13,261	13,178
Other Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	197,637	183,821	544,001	519,087
Other Operations [Member] \| Product [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	145,141	136,497	397,471	385,510
Other Operations [Member] \| Service [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	42,215	36,370	109,576	102,194
Other Operations [Member] \| Service [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 10,281	$ 10,954	$ 36,954	$ 31,383