Pension and Other Postretirement Benefit Plans (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Non-cash postretirement benefits curtailment and settlement gain	$ 0	$ 45.0	$ 0
Estimated Future Employer Contributions in Next Fiscal Year	0.2
Percentage funded from proceeds obtained from reversion of Plan	100.00%
Defined Contribution Plan, Cost Recognized	2.2	2.4	2.5
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of Net Gains (Losses)	0.9
Amortization of Net Prior Service Cost (Credit)	(0.2)
Defined Benefit Plan, Curtailments	3.8
Settlements, Benefit Obligation	1.6	0
Plan amendments	0	0
Non-cash postretirement benefits curtailment and settlement gain	0	0
Accumulated Benefit Obligation	160.9	177.4
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlements, Benefit Obligation	0	0.9
Defined Benefit Plan, Other Changes	0.3
Plan amendments	0	3.5
Non-cash postretirement benefits curtailment and settlement gain		$ 45.0