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Concentrations of Risk (Details) (USD $) In Thousands, unless otherwise specified | 2 Months Ended | 3 Months Ended
--- | --- | ---
Dec. 31, 2013 | Mar. 31, 2014
Concentration Risk [Line Items] |  |
Percentage of hourly employees represented by unions |  | 75.00%
Accounts receivable, net, current | $ 643,083 | $ 696,344
Number of employees of PCA |  | 13,600
Workforce Subject to Collective Bargaining Arrangements |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage |  | 51.00%
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage |  | 21.00%
Office Depot (including OfficeMax) | Credit Concentration Risk |  |
Concentration Risk [Line Items] |  |
Accounts receivable, net, current | $ 39,200 | $ 55,200
Office Depot (including OfficeMax) | Total Company Sales Revenue | Customer Concentration Risk |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage |  | 9.00%
Office Depot (including OfficeMax) | Total Company Receivables | Customer Concentration Risk |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage | 6.00% | 8.00%
Paper | Office Depot (including OfficeMax) | Paper Segment Sales Revenue | Customer Concentration Risk |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage |  | 42.00%

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