Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details)

v3.8.0.1
Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Goodwill [Roll Forward]      
Balance as of beginning of period $ 198,622    
Adjustments from the Ultra Seating acquisition    
Balance as of end of period 198,622    
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 4,004 $ 4,004  
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 202,164   $ 202,164
Accumulated Amortization (94,234)   (90,230)
Accumulated Impairment Loss (1,025)   (1,025)
Net Intangible Assets 106,905   110,909
Supply Chain Management      
Goodwill [Roll Forward]      
Balance as of beginning of period 63,190    
Adjustments from the Ultra Seating acquisition    
Balance as of end of period 63,190    
Federal Services      
Goodwill [Roll Forward]      
Balance as of beginning of period 30,883    
Adjustments from the Ultra Seating acquisition    
Balance as of end of period 30,883    
Aviation      
Goodwill [Roll Forward]      
Balance as of beginning of period 104,549    
Adjustments from the Ultra Seating acquisition    
Balance as of end of period 104,549    
Contract and customer-related      
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 173,094   173,094
Accumulated Amortization (76,222)   (72,937)
Accumulated Impairment Loss (1,025)   (1,025)
Net Intangible Assets 95,847   99,132
Acquired technologies      
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 12,400   12,400
Accumulated Amortization (7,687)   (7,406)
Accumulated Impairment Loss 0   0
Net Intangible Assets 4,713   4,994
Trade names      
Finite-Lived Intangible Assets, Net [Abstract]      
Cost 16,670   16,670
Accumulated Amortization (10,325)   (9,887)
Accumulated Impairment Loss 0   0
Net Intangible Assets $ 6,345   $ 6,783