Employee Benefit Plans (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to Employee Benefit Plans		1.9
Defined Benefit Plan Contributions Paid	$ 1.1
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to Employee Benefit Plans		0.5
Defined Benefit Plan Contributions Paid	$ 0.4