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Acquisitions (Narrative) (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 4 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 07, 2015 | Jun. 12, 2015 | May 12, 2015 | Oct. 03, 2015 | Apr. 04, 2015 | May 12, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Jun. 09, 2015 | Dec. 31, 2013
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Gross unrecognized tax benefits |  |  |  |  |  |  | $ (13,471) | $ (4,925) |  |
Redeemable noncontrolling interest |  |  |  |  |  |  | 21,952 | 0 |  |
Goodwill |  |  |  |  |  |  | 2,293,365 | $ 1,604,352 |  | $ 1,736,092
IVC Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Enterprise value |  | $ 1,146,437 |  |  |  |  |  |  |  |
Tax liabilities and indemnification assets assumed |  | 34,781 |  |  |  |  |  |  |  |
Gross unrecognized tax benefits |  |  |  |  |  |  | (11,180) |  |  |
Assumed indebtedness |  | 17,122 |  |  |  |  |  |  |  |
Cash payments to acquire entity |  | 732,189 |  |  |  |  |  |  |  |
Debt paid |  | $ 261,152 |  |  |  |  |  |  |  |
KAI Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Enterprise value |  |  | $ 194,613 |  |  |  |  |  |  |
Assumed indebtedness |  |  | 24 |  |  |  |  |  |  |
Cash payments to acquire entity |  |  | 169,540 |  |  |  |  |  |  |
Debt paid |  |  | $ 25,073 |  |  |  |  |  |  |
Percentage of voting interests acquired |  |  | 90.00% |  |  | 90.00% |  |  |  |
Ownership interest controlled by a third party |  |  | 10.00% |  |  | 10.00% |  |  |  |
Redeemable noncontrolling interest |  |  | $ 21,952 |  |  | $ 21,952 |  |  |  |
IVC Group and KAI Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Enterprise value |  |  |  |  |  | $ 1,341,050 |  |  |  |
Assumed indebtedness |  |  |  |  |  |  | 17,146 |  |  |
Goodwill |  |  |  |  |  |  | 740,140 |  |  |
Net sales of acquisitions |  |  |  |  |  |  | $ 396,000 |  |  |
Xtratherm [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Enterprise value | $ 158,851 |  |  |  |  |  |  |  |  |
Intangible assets subject to amortization | 39,839 |  |  |  |  |  |  |  |  |
Goodwill | 32,086 |  |  |  |  |  |  |  |  |
Minimum [Member] | IVC Group and KAI Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets subject to amortization, useful life |  |  |  |  |  |  | 12 years |  |  |
Maximum [Member] | IVC Group and KAI Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets subject to amortization, useful life |  |  |  |  |  |  | 14 years |  |  |
Tradenames [Member] | IVC Group and KAI Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Tradenames |  |  |  |  |  |  | $ 48,563 |  |  |
Tradenames [Member] | Xtratherm [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Tradenames | $ 4,681 |  |  |  |  |  |  |  |  |
Customer Relationships [Member] | IVC Group and KAI Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |  | 224,326 |  |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Direct transaction costs |  |  |  |  |  |  | $ 9,502 |  |  |
Flooring ROW [Member] | Unidentified Wood Business [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Enterprise value |  |  |  |  | $ 2,822 |  |  |  |  |
Goodwill |  |  |  |  | $ 2,659 |  |  |  |  |
Global Ceramic [Member] | Unidentified Ceramic Business [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Enterprise value |  |  |  | $ 20,423 |  |  |  |  |  |
Goodwill |  |  |  | $ 269 |  |  |  |  |  |
2.00% Senior Notes Due January 14, 2022 [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate percentage |  |  |  |  |  |  |  |  | 2.00% |
Treasury Stock [Member] | IVC Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Shares issued for acquisition (in shares) |  | 806,000 |  |  |  |  |  |  |  |
Shares issued for acquisition, value |  | $ 153,096 |  |  |  |  |  |  |  |

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