Segment Information - Percentage of Total Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from External Customer [Line Items]
Revenues	$ 432,679	$ 446,728	$ 1,308,443	$ 1,292,290
Fire Service
Revenue from External Customer [Line Items]
Revenues	160,515	175,732	496,478	481,610
Detection
Revenue from External Customer [Line Items]
Revenues	163,150	155,694	473,214	460,537
Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 109,014	$ 115,302	$ 338,751	$ 350,143
Revenue Benchmark | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Revenue Benchmark | Fire Service | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	37.00%	39.00%	38.00%	37.00%
Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	38.00%	35.00%	36.00%	36.00%
Revenue Benchmark | Industrial PPE and Other | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	25.00%	26.00%	26.00%	27.00%
Americas
Revenue from External Customer [Line Items]
Revenues	$ 299,497	$ 314,273	$ 909,745	$ 902,918
Americas | Fire Service
Revenue from External Customer [Line Items]
Revenues	111,992	131,516	352,730	354,729
Americas | Detection
Revenue from External Customer [Line Items]
Revenues	110,459	105,007	318,159	308,692
Americas | Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 77,046	$ 77,750	$ 238,856	$ 239,497
Americas | Revenue Benchmark | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Americas | Revenue Benchmark | Fire Service | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	37.00%	42.00%	39.00%	39.00%
Americas | Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	37.00%	33.00%	35.00%	34.00%
Americas | Revenue Benchmark | Industrial PPE and Other | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	26.00%	25.00%	26.00%	27.00%
International
Revenue from External Customer [Line Items]
Revenues	$ 133,182	$ 132,455	$ 398,698	$ 389,372
International | Fire Service
Revenue from External Customer [Line Items]
Revenues	48,523	44,216	143,748	126,881
International | Detection
Revenue from External Customer [Line Items]
Revenues	52,691	50,687	155,055	151,845
International | Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 31,968	$ 37,552	$ 99,895	$ 110,646
International | Revenue Benchmark | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
International | Revenue Benchmark | Fire Service | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	36.00%	33.00%	36.00%	33.00%
International | Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	40.00%	38.00%	39.00%	39.00%
International | Revenue Benchmark | Industrial PPE and Other | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	24.00%	29.00%	25.00%	28.00%