Goodwill and Other Intangible Assets, Intangible Assets (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets, Net [Abstract]
Total acquired intangible assets		$ 123,636	$ 123,631
Less accumulated amortization	[1]	(70,221)	(59,431)
Net acquired intangible assets		53,415	64,200
Intangible assets acquired [Abstract]
Intangible asset impairment		2,600	0	$ 0
Amortization of acquired intangible assets [Abstract]
Amortization expense		8,200	8,000	7,600
Estimated amortization expense in year 2021		6,800
Estimated amortization expense in year 2022		5,200
Estimated amortization expense in year 2023		5,000
Estimated amortization expense in years 2024		4,900
Estimated amortization expense in years 2025 through 2034		28,900
Other Intangible Assets [Abstract]
Amortization expense		8,200	8,000	7,600
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total acquired intangible assets		111,701	111,692
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total acquired intangible assets		6,980	6,980
Intangible assets acquired [Abstract]
Amount of acquired indefinite-lived intangible assets		2,600	5,200
Intangible asset impairment		2,600
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total acquired intangible assets		3,272	3,276
Patents [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total acquired intangible assets		723	723
Supply Agreement [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total acquired intangible assets		800	800
Leaseholds [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Total acquired intangible assets		160	160
Computer Software [Member]
Amortization of acquired intangible assets [Abstract]
Amortization expense		200
Other Intangible Assets [Abstract]
Other intangible assets		17,000	16,900
Accumulated computer software amortization		(16,400)	(16,200)
Amortization of computer software		300	$ 400	$ 400
Amortization expense		$ 200
Computer Software [Member] | Minimum [Member]
Other Intangible Assets [Abstract]
Estimated useful life of intangible assets		3 years
Computer Software [Member] | Maximum [Member]
Other Intangible Assets [Abstract]
Estimated useful life of intangible assets		10 years

[1] Applies to all intangible assets, except for related trademarks and trade names totaling $2.6 million and $5.2 million as of December 31, 2020 and 2019, respectively, which have indefinite useful lives and, as such, are not being amortized.