Pension Plan (Details) (USD $)	6 Months Ended
	Jun. 30, 2013
Pension Plan (Details) [Line Items]
Defined Benefit Pension Plan Liabilities, Current	$ 1,400,000
Defined Benefit Pension Plan, Liabilities, Noncurrent	5,100,000
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	1,400,000
Defined Benefit Plan, Contributions by Employer	218,000
2009 Plan [Member]
Pension Plan (Details) [Line Items]
Defined Benefit Plan Deferred Payment Minimum Funding Standard	285,000
2010 Plan [Member]
Pension Plan (Details) [Line Items]
Defined Benefit Plan Deferred Payment Minimum Funding Standard	$ 559,000