Employee Benefit Plans (Actuarial Assumptions Used for Accumulated Postretirement Benefit Obligation and Estimated Future Benefit Payments) (Details) (Other postretirement benefits, USD $)	Dec. 31, 2013	Dec. 31, 2012
Other postretirement benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount rate (as a percentage)	4.73%	3.92%
Estimated future benefit payments 2014	$ 500,000
Estimated future benefit payments 2015	500,000
Estimated future benefit payments 2016	500,000
Estimated future benefit payments 2017	500,000
Estimated future benefit payments 2018	500,000
Estimated future benefit payments, Five fiscal years after 2018	$ 2,300,000