Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details)

v3.19.3.a.u2
Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Property, plant and equipment gross $ 205,180 $ 207,734
Less Accumulated Depreciation 92,681 86,872
Total Property, Plant and Equipment, Net 112,499 120,862
Aerospace    
Property, Plant and Equipment [Line Items]    
Impairment of long-lived assets held-for-use 2,300  
Held for Sale | Test Systems    
Property, Plant and Equipment [Line Items]    
Net Property, Plant and Equipment 1,500 3,521
Land    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment gross 9,802 11,191
Building and Improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment gross 74,723 83,812
Machinery and Equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment gross 115,202 106,327
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment gross $ 5,453 $ 6,404