| **Restructuring**                                   | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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| **Restructuring and Related Activities [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| Restructuring                                       | 9. RestructuringDuring the second quarter of 2016, the Company initiated cost savings plans related to the consolidation and integration of the recently acquired Pelikan Artline into the Company's already existing Australian and New Zealand business. In addition the Company initiated additional cost savings plans to further enhance its North American operations.During 2014, we initiated restructuring actions that further enhanced our ongoing efforts to centralize, control and streamline our global and regional operational, supply chain and administrative functions, primarily associated with our North American school, office and Computer Products Group workforce. The remaining balance reported at December 31, 2015 has been substantially paid in 2016.We recorded $4.4 million and $0.2 million of expense for the three months ended June 30, 2016 and 2015, respectively and $4.4 million of expense and $0.3 million of income for the six months ended June 30, 2016 and 2015, respectively. Employee termination income in 2015 relates to the release of reserves no longer required.A summary of the activity in the restructuring accounts for the six months ended June 30, 2016 and 2015 was as follows:(in millions of dollars)Balance at December 31, 2015 Provision CashExpenditures Non-cashItems/Currency Change Balance at June 30, 2016Employee termination costs$0.9 $4.4 $(3.3) $0.1 $2.1Termination of lease agreements0.1 — (0.1) — —Total restructuring liability$1.0 $4.4 $(3.4) $0.1 $2.1(in millions of dollars)Balance at December 31, 2014 (Income)/ Provision CashExpenditures Non-cashItems/Currency Change Balance at June 30, 2015Employee termination costs$7.8 $(0.5) $(3.8) $(0.1) $3.4Termination of lease agreements0.6 0.2 (0.4) — 0.4Total restructuring liability$8.4 $(0.3) $(4.2) $(0.1) $3.8We expect the remaining $2.1 million of employee termination costs to be substantially paid in the next eighteen months. |

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| - Definition
The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4
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