Goodwill and Related Intangible Assets (Schedule of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	$ 125,972	$ 108,527
Total acquired intangible assets, Gross Carrying Amount	178,142	154,297
Accumulated Amortization, Finite-lived intangible assets	69,321	61,705
Total acquired intangible assets, Accumulated Amortization	69,321	61,705
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	7,235	6,139
Accumulated Amortization, Finite-lived intangible assets	4,557	4,105
Unpatented technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	35,962	29,544
Accumulated Amortization, Finite-lived intangible assets	17,970	15,807
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	79,702	71,195
Accumulated Amortization, Finite-lived intangible assets	44,723	40,294
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	2,174	1,649
Accumulated Amortization, Finite-lived intangible assets	1,689	1,499
Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Finite-lived intangible assets	899	0
Accumulated Amortization, Finite-lived intangible assets	382	0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Indefinite-lived intangible assets	52,170	45,770
Accumulated Amortization, Indefinite-lived intangible assets	$ 0	$ 0