Pension Plan (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Pension Plan (Details) [Line Items]
Defined Benefit Plan, Vesting Periods	5 years
Defined Benefit Plan, Funded Status of Plan	$ (6,733,000)	$ (4,806,000)
Increase (Decrease) in Pension Plan Obligations	1,500,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.00%	8.00%
Defined Benefit Plan, Future Amortization of Gain (Loss)	(562,000)
Defined Benefit Plan, Accumulated Benefit Obligation	14,700,000	11,900,000
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	1,400,000
Defined Benefit Pension Plan, Liabilities, Noncurrent	5,300,000
Increase (Decrease) in Deferred Pension Costs	1,020,000	313,000
Defined Benefit Plan, Contributions by Employer	958,000	669,000
Defined Benefit Plan, Expected Future Benefit Payments, Remainder of Fiscal Year	1,400,000
Defined Benefit Plan, Expected Contributions in Current Fiscal Year	229,000
Other Postretirement Defined Benefit Plan, Liabilities	500,000
Two Thousand Nine Plan [Member]
Pension Plan (Details) [Line Items]
Increase (Decrease) in Deferred Pension Costs	285,000
Two Thousand Ten Plan [Member]
Pension Plan (Details) [Line Items]
Increase (Decrease) in Deferred Pension Costs	559,000
Two Thousand Twelve Plan [Member]
Pension Plan (Details) [Line Items]
Increase (Decrease) in Deferred Pension Costs	$ 871,000