Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 534,517	$ 514,551	$ 469,333
Rooftop Units
Disaggregation of Revenue [Line Items]
Net sales	398,461	400,946	349,427
Condensing Units
Disaggregation of Revenue [Line Items]
Net sales	26,751	21,149	18,475
Air Handlers
Disaggregation of Revenue [Line Items]
Net sales	26,684	23,931	24,265
Outdoor Mechanical Rooms
Disaggregation of Revenue [Line Items]
Net sales	1,284	2,842	1,643
Cleanroom Systems
Disaggregation of Revenue [Line Items]
Net sales	2,288
Data Center Cooling Solutions
Disaggregation of Revenue [Line Items]
Net sales	1,688
Water-Source Heat Pumps
Disaggregation of Revenue [Line Items]
Net sales	21,174	19,053	25,447
Part Sales
Disaggregation of Revenue [Line Items]
Net sales	41,128	32,561	33,331
Other
Disaggregation of Revenue [Line Items]
Net sales	15,059	14,069	16,745
AAON Oklahoma
Disaggregation of Revenue [Line Items]
Net sales	463,845	458,957	418,669
AAON Oklahoma | Rooftop Units
Disaggregation of Revenue [Line Items]
Net sales	398,461	400,946	349,427
AAON Oklahoma | Condensing Units
Disaggregation of Revenue [Line Items]
Net sales	762	900	865
AAON Oklahoma | Air Handlers
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
AAON Oklahoma | Outdoor Mechanical Rooms
Disaggregation of Revenue [Line Items]
Net sales	820	2,355	1,134
AAON Oklahoma | Cleanroom Systems
Disaggregation of Revenue [Line Items]
Net sales	0
AAON Oklahoma | Data Center Cooling Solutions
Disaggregation of Revenue [Line Items]
Net sales	0
AAON Oklahoma | Water-Source Heat Pumps
Disaggregation of Revenue [Line Items]
Net sales	10,831	10,663	21,076
AAON Oklahoma | Part Sales
Disaggregation of Revenue [Line Items]
Net sales	41,127	32,561	33,331
AAON Oklahoma | Other
Disaggregation of Revenue [Line Items]
Net sales	11,844	11,532	12,836
AAON Coil Products
Disaggregation of Revenue [Line Items]
Net sales	66,589	55,594	50,664
AAON Coil Products | Rooftop Units
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
AAON Coil Products | Condensing Units
Disaggregation of Revenue [Line Items]
Net sales	25,989	20,249	17,610
AAON Coil Products | Air Handlers
Disaggregation of Revenue [Line Items]
Net sales	26,589	23,931	24,265
AAON Coil Products | Outdoor Mechanical Rooms
Disaggregation of Revenue [Line Items]
Net sales	464	487	509
AAON Coil Products | Cleanroom Systems
Disaggregation of Revenue [Line Items]
Net sales	0
AAON Coil Products | Data Center Cooling Solutions
Disaggregation of Revenue [Line Items]
Net sales	0
AAON Coil Products | Water-Source Heat Pumps
Disaggregation of Revenue [Line Items]
Net sales	10,343	8,390	4,371
AAON Coil Products | Part Sales
Disaggregation of Revenue [Line Items]
Net sales	1	0	0
AAON Coil Products | Other
Disaggregation of Revenue [Line Items]
Net sales	3,203	2,537	3,909
BasX
Disaggregation of Revenue [Line Items]
Net sales	4,083	0	0
BasX | Rooftop Units
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
BasX | Condensing Units
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
BasX | Air Handlers
Disaggregation of Revenue [Line Items]
Net sales	95	0	0
BasX | Outdoor Mechanical Rooms
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
BasX | Cleanroom Systems
Disaggregation of Revenue [Line Items]
Net sales	2,288
BasX | Data Center Cooling Solutions
Disaggregation of Revenue [Line Items]
Net sales	1,688
BasX | Water-Source Heat Pumps
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
BasX | Part Sales
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
BasX | Other
Disaggregation of Revenue [Line Items]
Net sales	$ 12	$ 0	$ 0