Select balance sheet data - Schedule of Listing of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Amortizable intangible assets [Abstract]
Accumulated amortization	$ (46,965)	$ (44,288)
Total amortizable intangible assets, net	54,979	57,656
Total intangible assets, net	58,790	61,467
Customer Relationships and Contracts [Member]
Amortizable intangible assets [Abstract]
Amortizable intangible assets, gross	$ 78,340	$ 78,340
Customer Relationships and Contracts [Member] | Minimum [Member]
Amortizable intangible assets [Abstract]
Intangible assets useful Lives	9 years	9 years
Customer Relationships and Contracts [Member] | Maximum [Member]
Amortizable intangible assets [Abstract]
Intangible assets useful Lives	12 years	12 years
Trade Names [Member]
Amortizable intangible assets [Abstract]
Intangible assets useful Lives	10 years	10 years
Amortizable intangible assets, gross	$ 14,780	$ 14,780
Noncompete Agreements [Member]
Amortizable intangible assets [Abstract]
Intangible assets useful Lives	5 years	5 years
Amortizable intangible assets, gross	$ 8,800	$ 8,800
Patents [Member]
Amortizable intangible assets [Abstract]
Intangible assets useful Lives	19 years	19 years
Amortizable intangible assets, gross	$ 24	$ 24
Brand Name [Member]
Amortizable intangible assets [Abstract]
Total intangible assets, net	$ 3,811	$ 3,811