Segment Information - Percentage of Total Sales by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue from External Customer [Line Items]
Revenues	$ 474,116	$ 462,463	$ 895,456	$ 875,765
Fire Service
Revenue from External Customer [Line Items]
Revenues	193,835	170,848	354,906	310,064
Detection
Revenue from External Customer [Line Items]
Revenues	163,306	172,269	313,922	335,962
Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 116,975	$ 119,346	$ 226,628	$ 229,739
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%	37.00%	40.00%	35.00%
Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	34.00%	37.00%	35.00%	39.00%
Revenue Benchmark | Industrial PPE and Other | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	25.00%	26.00%	25.00%	26.00%
Americas
Revenue from External Customer [Line Items]
Revenues	$ 320,139	$ 314,711	$ 613,299	$ 610,249
Americas | Fire Service
Revenue from External Customer [Line Items]
Revenues	127,174	111,405	237,065	207,700
Americas | Detection
Revenue from External Customer [Line Items]
Revenues	110,815	118,487	216,722	240,738
Americas | Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 82,150	$ 84,819	$ 159,512	$ 161,811
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%	35.00%	39.00%	34.00%
Americas | Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	35.00%	38.00%	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%	27.00%	26.00%	27.00%
International
Revenue from External Customer [Line Items]
Revenues	$ 153,977	$ 147,752	$ 282,157	$ 265,516
International | Fire Service
Revenue from External Customer [Line Items]
Revenues	66,661	59,443	117,841	102,364
International | Detection
Revenue from External Customer [Line Items]
Revenues	52,491	53,782	97,200	95,224
International | Industrial PPE and Other
Revenue from External Customer [Line Items]
Revenues	$ 34,825	$ 34,527	$ 67,116	$ 67,928
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%	38.00%
International | Revenue Benchmark | Detection | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	34.00%	37.00%	34.00%	36.00%
International | Revenue Benchmark | Industrial PPE and Other | Product Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk percentage	23.00%	23.00%	24.00%	26.00%