Quarterly report pursuant to Section 13 or 15(d)

Revenue - Impact on Financial Statements (Details)

v3.10.0.1
Revenue - Impact on Financial Statements (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Jan. 01, 2018
Dec. 31, 2017
Income Statement [Abstract]            
Sales $ 212,674 $ 149,636 $ 600,339 $ 453,146    
Cost of Products Sold   117,143   348,186    
Provision for (Benefit from) Income Taxes (1,419) 2,586 2,370 9,374    
Net Income 16,999 6,060 34,318 25,332    
Balance Sheet            
Accounts Receivable, Net of Allowance for Doubtful Accounts 189,110   189,110   $ 136,638 $ 132,633
Inventories 154,870   154,870   142,239 150,196
Accrued Expenses and Other Current Liabilities 43,338   43,338     38,749
Customer Advance Payments and Deferred Revenue 30,186   30,186   11,431 19,607
Other Liabilities 31,258   31,258     34,060
Other Shareholders’ Equity 384,529   384,529     342,939
Calculated under Revenue Guidance in Effect before Topic 606            
Income Statement [Abstract]            
Provision for (Benefit from) Income Taxes (1,549)   2,218      
Net Income 16,754   33,974      
Balance Sheet            
Accounts Receivable, Net of Allowance for Doubtful Accounts 178,996   178,996     132,633
Inventories 164,100   164,100     150,196
Accrued Expenses and Other Current Liabilities 41,443   41,443      
Customer Advance Payments and Deferred Revenue 34,022   34,022     $ 19,607
Other Liabilities 32,045   32,045      
Other Shareholders’ Equity 380,917   380,917      
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606            
Income Statement [Abstract]            
Provision for (Benefit from) Income Taxes 130   152      
Net Income 245   344      
Balance Sheet            
Accounts Receivable, Net of Allowance for Doubtful Accounts 10,114   10,114   4,005  
Inventories (9,230)   (9,230)   (7,957)  
Accrued Expenses and Other Current Liabilities 1,895   1,895      
Customer Advance Payments and Deferred Revenue (3,836)   (3,836)   $ (8,176)  
Other Liabilities (787)   (787)      
Other Shareholders’ Equity 3,612   3,612      
Aerospace Segment            
Income Statement [Abstract]            
Sales 169,579 128,663 500,383 395,037    
Aerospace Segment | Calculated under Revenue Guidance in Effect before Topic 606            
Income Statement [Abstract]            
Sales 168,384   499,959      
Aerospace Segment | Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606            
Income Statement [Abstract]            
Sales 1,195   424      
Test Systems Segment            
Income Statement [Abstract]            
Sales 43,095 $ 20,973 99,956 $ 58,109    
Test Systems Segment | Calculated under Revenue Guidance in Effect before Topic 606            
Income Statement [Abstract]            
Sales 41,176   98,612      
Test Systems Segment | Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606            
Income Statement [Abstract]            
Sales 1,919   1,344      
Product            
Income Statement [Abstract]            
Cost of Products Sold 166,354   467,315      
Product | Calculated under Revenue Guidance in Effect before Topic 606            
Income Statement [Abstract]            
Cost of Products Sold 163,615   466,043      
Product | Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606            
Income Statement [Abstract]            
Cost of Products Sold $ 2,739   $ 1,272