Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Disaggregated net sales by major source:

	Three Months Ended				Six Months Ended
	June 30, 2021		June 30, 2020		June 30, 2021		June 30, 2020
	(in thousands)
Rooftop units	$	107,370	$	99,145	$	194,795	$	209,975
Condensing units	7,302		4,505		13,833		9,003
Air handlers	7,265		6,016		13,679		12,263
Outdoor mechanical rooms	764		434		975		1,349
Water source heat pumps	6,425		3,796		11,090		7,499
Part sales	10,717		7,565		18,223		14,078
Other	4,033		4,135		7,069		8,912
Net Sales	$	143,876	$	125,596	$	259,664	$	263,079

Disaggregated units sold by major source:

	Three Months Ended		Six Months Ended
	June 30, 2021	June 30, 2020	June 30, 2021	June 30, 2020
Rooftop units	4,657	3,746	7,616	7,807
Condensing units	618	446	1,136	854
Air handlers	707	501	1,200	1,011
Outdoor mechanical rooms	13	6	20	16
Water source heat pumps	1,908	1,645	3,532	3,262
Total Units	7,903	6,344	13,504	12,950