Acquisition and Divestiture Activities (Details) - USD ($) $ in Thousands					12 Months Ended
	Oct. 01, 2020	Jan. 03, 2019	Jun. 11, 2018	Feb. 08, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Acquisition of business, net of cash acquired					$ 25,852	$ 11,862	$ 14,880
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill					158,183	150,642	$ 147,480
Bi-Metallix [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Business acquisition, effective date of acquisition		Jan. 03, 2019
Business acquisition, name of acquired entity		Bi-Metallix, Inc.
Acquisition of business, net of cash acquired		$ 11,862
Definite-lived intangible assets		2,900
Goodwill related to acquisitions		$ 3,324				$ 3,324
UltraSource [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Business acquisition, effective date of acquisition				Feb. 08, 2018
Business acquisition, name of acquired entity				UltraSource, Inc.
Acquisition of business, net of cash acquired				$ 13,596
Definite-lived intangible assets				6,500
Goodwill related to acquisitions				$ 4,227
EuroPower [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Business acquisition, effective date of acquisition			Jun. 11, 2018
Business acquisition, name of acquired entity			EuroPower Holdings Ltd.
Acquisition of business, net of cash acquired			$ 2,939
Goodwill related to acquisitions			$ 1,068
Applied Thin-Film Products [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Business acquisition, effective date of acquisition	Oct. 01, 2020
Business acquisition, name of acquired entity	Applied Thin-Film Products
Acquisition of business, net of cash acquired	$ 25,852
Definite-lived intangible assets	10,800
Goodwill related to acquisitions	$ 6,548				6,548
Remaining acquisition price to be paid					$ 350