Annual report pursuant to Section 13 and 15(d)

Acquisitions (Details)

v3.8.0.1
Acquisitions (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 01, 2017
Apr. 03, 2017
Jan. 14, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]            
Business acquisition purchase price paid in cash       $ 114,039 $ 0 $ 52,276
Acquisition related expenses       $ 300   $ 400
Telefonix, Incorporated            
Business Acquisition [Line Items]            
Percentage of acquired stock 100.00%          
Armstrong Areospace, Inc.            
Business Acquisition [Line Items]            
Percentage of acquired stock     100.00%      
Goodwill and purchased intangible assets deductible for tax purposes period (in years)     15 years      
Business acquisition purchase price paid in cash     $ 52,300      
Astronics Custom Control Concepts Inc. | Telefonix, Incorporated            
Business Acquisition [Line Items]            
Business acquisition purchase price paid in cash $ 103,800          
Cash acquired $ 200          
Astronics Custom Control Concepts Inc. | Custom Control Concepts LLC            
Business Acquisition [Line Items]            
Business acquisition purchase price paid in cash   $ 10,200        
Cash acquired   $ 500