Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangibles - Goodwill (Details)

v3.8.0.1
Goodwill and Other Intangibles - Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Changes in the carrying amount of goodwill      
Gross Goodwill $ 1,839,207 $ 1,807,079 $ 1,806,062
Additions 32,128 1,017  
Accumulated Impairment Losses (762,021) (762,021)  
Net Goodwill 1,077,186 1,045,058  
Impairment of goodwill 0 0  
Installation      
Changes in the carrying amount of goodwill      
Gross Goodwill 1,422,920 1,390,792 1,389,775
Additions 32,128 1,017  
Accumulated Impairment Losses (762,021) (762,021)  
Net Goodwill 660,899 628,771  
Distribution      
Changes in the carrying amount of goodwill      
Gross Goodwill 416,287 416,287 $ 416,287
Net Goodwill $ 416,287 $ 416,287