Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangibles (Details)

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Goodwill and Other Intangibles (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Changes in the carrying amount of goodwill    
Gross Goodwill $ 1,806,040 $ 1,806,040
Accumulated Impairment Losses (762,000)  
Net Goodwill 1,044,040 1,044,040
Finite-Lived Intangible Assets, Net [Abstract]    
Other intangible assets, net 2,100 2,600
Accumulated amortization 17,700 17,200
Installation    
Changes in the carrying amount of goodwill    
Gross Goodwill 1,389,750 1,389,750
Accumulated Impairment Losses (762,000)  
Net Goodwill 627,750  
Distribution    
Changes in the carrying amount of goodwill    
Gross Goodwill 416,290 $ 416,290
Net Goodwill $ 416,290