Segment Information - Percentage of Total Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue from External Customer [Line Items]
Revenues	$ 468,445	$ 432,679	$ 1,363,900	$ 1,308,443
Fire Service
Revenue from External Customer [Line Items]
Revenues	191,188	163,150	546,094	473,214
Detection
Revenue from External Customer [Line Items]
Revenues	158,654	160,515	472,576	496,478
Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 118,603	$ 109,014	$ 345,230	$ 338,751
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	41.00%	38.00%	40.00%	36.00%
Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	34.00%	37.00%	35.00%	38.00%
Revenue Benchmark | Industrial PPE and Other | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	25.00%	25.00%	25.00%	26.00%
Americas
Revenue from External Customer [Line Items]
Revenues	$ 313,350	$ 299,497	$ 926,649	$ 909,745
Americas | Fire Service
Revenue from External Customer [Line Items]
Revenues	124,111	110,459	361,176	318,159
Americas | Detection
Revenue from External Customer [Line Items]
Revenues	109,497	111,992	326,220	352,730
Americas | Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 79,742	$ 77,046	$ 239,253	$ 238,856
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	40.00%	37.00%	39.00%	35.00%
Americas | Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	35.00%	37.00%	35.00%	39.00%
Americas | Revenue Benchmark | Industrial PPE and Other | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	25.00%	26.00%	26.00%	26.00%
International
Revenue from External Customer [Line Items]
Revenues	$ 155,095	$ 133,182	$ 437,251	$ 398,698
International | Fire Service
Revenue from External Customer [Line Items]
Revenues	67,077	52,691	184,918	155,055
International | Detection
Revenue from External Customer [Line Items]
Revenues	49,157	48,523	146,356	143,748
International | Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 38,861	$ 31,968	$ 105,977	$ 99,895
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	43.00%	40.00%	42.00%	39.00%
International | Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	32.00%	36.00%	33.00%	36.00%
International | Revenue Benchmark | Industrial PPE and Other | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	25.00%	24.00%	25.00%	25.00%