Goodwill and Related Intangible Assets (Schedule of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	$ 108,527	$ 106,806
Total acquired intangible assets, Gross Carrying Amount	154,297	150,676
Accumulated Amortization, Finite-lived intangible assets	61,705	54,301
Total acquired intangible assets, Accumulated Amortization	61,705	54,301
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	6,139	6,094
Accumulated Amortization, Finite-lived intangible assets	4,105	3,518
Unpatented technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	29,544	28,644
Accumulated Amortization, Finite-lived intangible assets	15,807	13,881
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	71,195	70,419
Accumulated Amortization, Finite-lived intangible assets	40,294	35,678
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	1,649	1,649
Accumulated Amortization, Finite-lived intangible assets	1,499	1,224
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Indefinite-lived intangible assets	45,770	43,870
Accumulated Amortization, Indefinite-lived intangible assets	$ 0	$ 0
Minimum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Minimum | Unpatented technology and patents
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Minimum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Minimum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	4 years
Maximum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	15 years
Maximum | Unpatented technology and patents
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	20 years
Maximum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	17 years
Maximum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years