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 | |
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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