Summary of Significant Accounting Policies - Narrative (Details) - USD ($)		12 Months Ended
	Dec. 20, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2019	Mar. 31, 2018
Schedule of Useful Lives [Line Items]
Maximum maturity term to be considered cash and cash equivalents		3 months
Impairment of goodwill		$ 0
Impairment of other intangible assets		0
Foreign currency transaction gains (losses)		(1,518,000)	$ (6,485,000)	$ (3,879,000)
Research and development expense		16,949,000	15,666,000	$ 16,193,000
ROU assets		27,539,000	31,411,000		$ 31,724,000
Lease liabilities		28,011,000	32,125,000		$ 32,579,000
Retained earnings		1,519,811,000	1,489,176,000
Accumulated other non-owner changes to equity		$ (122,315,000)	(210,495,000)
Accounting Standards Update 2018-02 [Member]
Schedule of Useful Lives [Line Items]
Retained earnings						$ 19,331,000
Accumulated other non-owner changes to equity						$ (19,331,000)
Buildings [Member] | Minimum [Member]
Schedule of Useful Lives [Line Items]
Useful lives of property, plant and equipment		20 years
Buildings [Member] | Maximum [Member]
Schedule of Useful Lives [Line Items]
Useful lives of property, plant and equipment		50 years
Machinery and equipment [Member] | Minimum [Member]
Schedule of Useful Lives [Line Items]
Useful lives of property, plant and equipment		4 years
Machinery and equipment [Member] | Maximum [Member]
Schedule of Useful Lives [Line Items]
Useful lives of property, plant and equipment		12 years
Seeger Orbis GmbH &Co. OHG and Seeger-Orbis Mechanical Components (Tianjin) Co., Ltd. [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Schedule of Useful Lives [Line Items]
Goodwill	$ 15,000,000		15,000,000
Impairment of goodwill	$ 5,600,000		$ 5,600,000