Employee Benefit Plans (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Benefit Plans (Textual) [Abstract]
Actual return for qualified pension plan assets	4.10%	4.10%	7.00%	7.70%
Weighted average annualized expected return on qualified pension plan assets			7.60%
Qualified Pension
Employee Benefit Plans (Textual) [Abstract]
Expected employer contributions in current fiscal year	$ 22.0		$ 22.0
Employer pension contribution year-to-date			13.2
Expected benefit payments, remainder of fiscal year	8.8		8.8
Post-retirement Healthcare
Employee Benefit Plans (Textual) [Abstract]
Expected employer contributions in current fiscal year	5.1		5.1
Benefit contribution payments to post-retirement healthcare			2.6
Expected benefit payments, remainder of fiscal year	$ 2.5		$ 2.5