Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Details)

v3.5.0.2
Acquisitions (Details)
1 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2016
USD ($)
Jan. 28, 2015
business
May 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Business Acquisition [Line Items]            
Goodwill       $ 198,622,000   $ 198,545,000
Earn-out obligation payments       18,515,000 $ 11,713,000  
Ultra Seating            
Business Acquisition [Line Items]            
Percentage of business acquired           100.00%
Initial purchase consideration paid           $ 3,600,000
Payments to acquire businesses           3,800,000
Goodwill, Purchase Accounting Adjustments       $ 0    
Goodwill           2,000,000
Ultra Seating | Customer Relationships            
Business Acquisition [Line Items]            
Intangible assets           $ 1,500,000
Aviation            
Business Acquisition [Line Items]            
Percentage of business acquired   100.00%        
Number of businesses acquired | business   4        
Earn-out obligation payments $ 10,500,000   $ 8,000,000