Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Principles and Practices (Detail)

v3.3.1.900
Summary of Significant Accounting Principles and Practices (Detail)
 12 Months Ended
Oct. 08, 2015
Sep. 10, 2015
Jan. 14, 2015
USD ($)
Dec. 05, 2013
USD ($)
Dec. 31, 2015
USD ($)
segment
reporting_unit
contract
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Nov. 01, 2015
reporting_unit
Business Acquisition                
Number of reportable segments | segment         2      
Revenue and Expense Recognition                
Significant contracts with right of return | contract         0      
Revenue recognized from long term fixed price contracts         $ 17,200,000 $ 2,700,000 $ 4,400,000  
Research and development, design and related engineering         $ 90,100,000 76,700,000 52,800,000  
Class of Stock                
Period of options granted (in years)         5 years      
Excess tax benefits from share based payment arrangements         $ 2,973,000 5,262,000 1,198,000  
Cash and cash equivalents maturity period (in months)         3 months      
Property, Plant and Equipment                
Depreciation expense         $ 13,300,000 10,600,000 5,700,000  
Capital leases payments due in 2016         2,600,000      
Capital leases payments due in 2017         2,600,000      
Capital leases payments due in 2018         2,600,000      
Capital leases payments due in 2019         2,000,000      
Capital leases payments due in 2020         $ 2,100,000      
Goodwill and Intangible Assets                
Number of reporting units | reporting_unit         11      
Number of reporting units have goodwill and subject to goodwill impairment test | reporting_unit               8
Goodwill impairment charge         $ 0 0 0  
Intangible asset impairment charge         0 0 0  
Foreign Currency Translation                
Exchange loss         $ 1,000,000 0 $ 0  
Year 1                
Class of Stock                
Annual vesting percentage         20.00%      
Year 2                
Class of Stock                
Annual vesting percentage         20.00%      
Year 3                
Class of Stock                
Annual vesting percentage         20.00%      
Year 4                
Class of Stock                
Annual vesting percentage         20.00%      
Year 5                
Class of Stock                
Annual vesting percentage         20.00%      
Building                
Property, Plant and Equipment                
Building acquired under capital leases, net         $ 12,300,000 12,700,000    
Building acquired under capital leases, gross         14,800,000 16,000,000    
Accumulated amortization         $ 2,500,000 $ 3,300,000    
Building | Minimum                
Property, Plant and Equipment                
Property, plant and equipment, useful life (in years)         25 years      
Building | Maximum                
Property, Plant and Equipment                
Property, plant and equipment, useful life (in years)         40 years      
Machinery and Equipment | Minimum                
Property, Plant and Equipment                
Property, plant and equipment, useful life (in years)         4 years      
Machinery and Equipment | Maximum                
Property, Plant and Equipment                
Property, plant and equipment, useful life (in years)         10 years      
Convertible Class B Stock                
Class of Stock                
Stock distribution 0.15 0.15            
PGA Electronic S.A.                
Business Acquisition                
Effective date of acquisition       Dec. 05, 2013        
Percentage of acquired stock       100.00%        
Cash purchase price       $ 9,100,000        
Armstrong Areospace, Inc.                
Business Acquisition                
Effective date of acquisition     Jan. 14, 2015          
Percentage of acquired stock     100.00%          
Cash purchase price     $ 52,300,000