Pension Plan (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Plan (Details) [Line Items]
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	$ 1,400,000
Defined Benefit Pension Plan, Liabilities, Noncurrent	3,300,000
Defined Benefit Plan, Expected Contributions in Current Fiscal Year	1,400,000
Increase (Decrease) in Deferred Pension Costs	(251,000)	142,000
Defined Benefit Plan, Contributions by Employer	498,000
2009 Plan [Member]
Pension Plan (Details) [Line Items]
Increase (Decrease) in Deferred Pension Costs	285,000
2010 Plan [Member]
Pension Plan (Details) [Line Items]
Increase (Decrease) in Deferred Pension Costs	559,000
2012 Plan [Member]
Pension Plan (Details) [Line Items]
Increase (Decrease) in Deferred Pension Costs	$ 871,000