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Acquisitions Additional Information (Details) $ in Millions |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 30, 2016 USD ($) facility | Aug. 29, 2016 USD ($) facility | Mar. 31, 2017 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  |  | $ 731.1 | $ 737.9
TimBar Corporation |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of corrugated products production facilities acquired | facility |  | 6 |  |  |
Cash purchase price |  | $ 385.6 |  |  |
Debt instrument, face amount |  | $ 385.0 |  |  |
Debt instrument, term |  | 5 years |  |  |
Adjustment to increase (decrease) goodwill |  |  | $ (1.1) | (1.1) |
Purchase price |  |  | $ 384.5 |  |
Acquired finite-lived intangible assets, weighted average useful life |  | 14 years 2 months 12 days |  |  |
Columbus Container Inc |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of corrugated products production facilities acquired | facility | 1 |  |  |  |
Number of corrugated products warehousing facilities acquired | facility | 5 |  |  |  |
Cash purchase price | $ 99.7 |  |  |  |
Adjustment to increase (decrease) goodwill |  |  |  | $ (5.7) |
Acquired finite-lived intangible assets, weighted average useful life | 14 years 1 month 6 days |  |  |  |
Minimum | TimBar Corporation |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Property, plant and equipment useful life |  | 2 years |  |  |
Minimum | Columbus Container Inc |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Property, plant and equipment useful life | 1 year |  |  |  |
Maximum | TimBar Corporation |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Property, plant and equipment useful life |  | 24 years |  |  |
Maximum | Columbus Container Inc |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Property, plant and equipment useful life | 32 years |  |  |  |

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