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Summary of Significant Accounting Policies - Basis of presentation and description of business (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 USD ($) channel | Dec. 31, 2015 USD ($)
Business Acquisition [Line Items] |  |
Number of products sales channels | channel | 2 |
Ownership percentage | 50.00% |
Net investment | $ | $ 14.1 | $ 13.6
Comfort Revolution |  |
Business Acquisition [Line Items] |  |
Equity method investment, ownership percentage | 45.00% |

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