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Employee Benefits (Details 4) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 SERP's | Dec. 31, 2013 Defined Benefit Plans | Dec. 31, 2013 Postretirement Medical Plans item | Oct. 02, 2011 Postretirement Medical Plans | Dec. 31, 2013 Supplemental Bonus Plan | Dec. 31, 2012 Supplemental Bonus Plan | Dec. 31, 2011 Supplemental Bonus Plan
Effect of one-percentage-point change in assumed health care cost trend rates |  |  |  |  |  |  |  |  |
Effect of 1% increase on total service and interest cost components | $ 0.1 | $ 0.1 |  |  |  |  |  |  |
Effect of 1% decrease on total service and interest cost components | (0.1) | (0.1) |  |  |  |  |  |  |
Effect of 1% increase on postretirement benefit obligation | 0.5 | 0.6 |  |  |  |  |  |  |
Effect of 1% decrease on postretirement benefit obligation | (0.5) | (0.6) |  |  |  |  |  |  |
Employee Benefits |  |  |  |  |  |  |  |  |
Number of subsidiaries of entity |  |  |  |  | 1 |  |  |  |
Maximum age limit for eligibility |  |  |  |  | 65 years |  |  |  |
Reduction to the benefit obligation due to amendment in terms of plan |  |  |  |  |  | 10.1 |  |  |
Average remaining years of service to full eligibility |  |  |  |  | 6 years |  |  |  |
Summary of benefit payments under the Company's various defined benefit plans, which reflect expected future employee service, as appropriate, expected to be paid in the future periods |  |  |  |  |  |  |  |  |
2014 |  |  | 3.6 | 3.5 | 0.9 |  |  |  |
2015 |  |  | 1.3 | 3.7 | 0.9 |  |  |  |
2016 |  |  | 1.2 | 4.1 | 0.9 |  |  |  |
2017 |  |  | 13.1 | 4.0 | 1.1 |  |  |  |
2018 |  |  | 1.7 | 4.2 | 1.0 |  |  |  |
2019-2023 |  |  | 12.4 | 25.2 | 6.3 |  |  |  |
Amounts in accumulated other comprehensive income that are expected to be recognized as components of net periodic benefit cost during 2014 |  |  |  |  |  |  |  |  |
Actuarial loss |  |  | 0.7 | 0.4 | 0.4 |  |  |  |
Prior service (credit) cost |  |  | (0.4) | 0.2 | (1.7) |  |  |  |
Total |  |  | 0.3 | 0.6 | (1.3) |  |  |  |
General disclosures of the plan |  |  |  |  |  |  |  |  |
Number of shares of the entity to be contributed to the plan as a result of acquisition |  |  |  |  |  |  | 258,006 |  |
Number of shares equivalent to the cash liability associated with post-employment liability |  |  |  |  |  |  | 102,735 |  |
Aggregate obligation to the plan acquired |  |  |  |  |  |  | 7.8 |  |
(Income) expense from mark to market adjustments |  |  |  |  |  |  | $ 1.5 | $ 1.6 | $ (0.2)

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- Definition The amount of increase or decrease in the accumulated benefit obligation related to the effects of a change in the substantive terms of an existing defined benefit pension plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Glossary Plan Amendment -URI http://asc.fasb.org/extlink&oid=6520743 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Plan Amendment -URI http://asc.fasb.org/extlink&oid=6520782 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (r) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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