Employee Benefit Plans (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Benefit Plans (Textual) [Abstract]
Actual return for qualified pension plan assets	14.00%	(0.90%)	10.50%	2.90%
Weighted average annualized expected return on qualified pension plan assets			7.80%
Qualified Pension
Employee Benefit Plans (Textual) [Abstract]
Expected employer contributions in current fiscal year			$ 35.0
Employer pension contribution year-to-date			15.0
Post-retirement Healthcare
Employee Benefit Plans (Textual) [Abstract]
Benefit contribution payments to post-retirement healthcare			$ 2.3