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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]  
Components of inventories Inventories consisted of the following:
March 31,
2021		December 31,
2020
Raw materials and parts$134,636 $132,041 
Work-in-progress59,681 55,688 
Finished goods127,024 109,882 
 $321,341 $297,611 
Components of other intangible assets Other intangible assets consisted of the following:
 March 31, 2021December 31, 2020
Gross
Amount		Accumulated
Amortization		Intangibles, NetGross
Amount		Accumulated
Amortization		Intangibles, Net
Customer relationships$279,600 $(70,393)$209,207 $201,445 $(68,319)$133,126 
Proven technology and patents98,175 (51,945)46,230 78,312 (52,138)26,174 
Trade name (finite life)8,164 (3,415)4,749 4,896 (3,444)1,452 
Trade name (indefinite life)35,539 — 35,539 35,595 — 35,595 
Other8,056 (5,136)2,920 5,215 (4,777)438 
 $429,534 $(130,889)$298,645 $325,463 $(128,678)$196,785