Annual report pursuant to Section 13 and 15(d)

Revenue - Revenue Disaggregated by Market (Details)

v3.10.0.1
Revenue - Revenue Disaggregated by Market (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disaggregation of Revenue [Line Items]      
Sales $ 803,256 $ 624,464 $ 633,123
Commercial Transport      
Disaggregation of Revenue [Line Items]      
Sales 536,269 414,523 435,552
Military      
Disaggregation of Revenue [Line Items]      
Sales 68,138 61,270 54,556
Business Jet      
Disaggregation of Revenue [Line Items]      
Sales 43,090 41,298 25,407
Other      
Disaggregation of Revenue [Line Items]      
Sales 28,128 17,512 18,526
Aerospace      
Disaggregation of Revenue [Line Items]      
Sales 675,625 534,603 534,041
Semiconductor      
Disaggregation of Revenue [Line Items]      
Sales 84,254 31,999 37,939
Aerospace & Defense      
Disaggregation of Revenue [Line Items]      
Sales 43,377 57,862 61,143
Test Systems      
Disaggregation of Revenue [Line Items]      
Sales $ 127,631 $ 89,861 $ 99,082