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Subsequent Events - Additional Information (Detail) (USD $) | 9 Months Ended | 12 Months Ended |  | 1 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2013 T | Sep. 30, 2012 | Dec. 31, 2012 Boise Incorporation | Sep. 30, 2013 Boise Incorporation | Oct. 25, 2013 Subsequent Event T | Oct. 25, 2013 Subsequent Event Boise Incorporation | Oct. 25, 2013 Subsequent Event Boise Incorporation Term LoanA Facility | Oct. 25, 2013 Subsequent Event Boise Incorporation 4.50% notes
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Net sales reported by acquired entity for last fiscal year |  |  | $ 2,600,000,000 |  |  |  |  |
Business acquisition common shares outstanding, per share |  |  |  |  |  | $ 12.55 |  |
Business acquisition, outstanding indebtedness |  |  |  |  |  | 775,000,000 |  |
Business combination, transaction value |  |  |  |  |  | 1,940,000,000 |  |
Business acquisition, transaction cost |  |  |  | 4,200,000 |  |  |  |
Senior notes, redemption premium |  | (21,296,000) |  |  |  | 55,700,000 |  |
New borrowings |  |  |  |  |  | $ 2,000,000,000 | $ 1,300,000,000 | $ 700.0
Note interest rate |  |  |  |  |  |  |  | 4.50%
Note maturity period |  |  |  |  |  |  |  | 10 years
Estimated production capacity | 2,600,000 |  |  |  | 3,700,000 |  |  |
Corrugated products volume percentage increase |  |  |  |  | 30.00% |  |  |

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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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