Revenue Recognition - Disaggregated Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 182,771	$ 115,788
AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	139,867	99,976
AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	21,935	15,812
BasX
Disaggregation of Revenue [Line Items]
Net sales	20,969	0
Rooftop Units
Disaggregation of Revenue [Line Items]
Net sales	121,706	87,425
Rooftop Units | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	121,706	87,425
Rooftop Units | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	0	0
Rooftop Units | BasX
Disaggregation of Revenue [Line Items]
Net sales	0	0
Condensing Units
Disaggregation of Revenue [Line Items]
Net sales	9,218	6,531
Condensing Units | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	242	249
Condensing Units | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	8,976	6,282
Condensing Units | BasX
Disaggregation of Revenue [Line Items]
Net sales	0	0
Air Handlers
Disaggregation of Revenue [Line Items]
Net sales	10,777	6,414
Air Handlers | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	0	0
Air Handlers | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	9,438	6,414
Air Handlers | BasX
Disaggregation of Revenue [Line Items]
Net sales	1,339	0
Outdoor Mechanical Rooms
Disaggregation of Revenue [Line Items]
Net sales	664	211
Outdoor Mechanical Rooms | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	554	63
Outdoor Mechanical Rooms | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	110	148
Outdoor Mechanical Rooms | BasX
Disaggregation of Revenue [Line Items]
Net sales	0	0
Cleanroom Systems
Disaggregation of Revenue [Line Items]
Net sales	8,039
Cleanroom Systems | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	0
Cleanroom Systems | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	0
Cleanroom Systems | BasX
Disaggregation of Revenue [Line Items]
Net sales	8,039
Data Center Cooling Solutions
Disaggregation of Revenue [Line Items]
Net sales	10,868
Data Center Cooling Solutions | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	0
Data Center Cooling Solutions | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	0
Data Center Cooling Solutions | BasX
Disaggregation of Revenue [Line Items]
Net sales	10,868
Water-Source Heat Pumps
Disaggregation of Revenue [Line Items]
Net sales	5,339	4,665
Water-Source Heat Pumps | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	2,986	2,388
Water-Source Heat Pumps | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	2,353	2,277
Water-Source Heat Pumps | BasX
Disaggregation of Revenue [Line Items]
Net sales	0	0
Part Sales
Disaggregation of Revenue [Line Items]
Net sales	10,216	7,506
Part Sales | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	10,216	7,506
Part Sales | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	0	0
Part Sales | BasX
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other
Disaggregation of Revenue [Line Items]
Net sales	5,944	3,036
Other | AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	4,163	2,345
Other | AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	1,058	691
Other | BasX
Disaggregation of Revenue [Line Items]
Net sales	$ 723	$ 0