Post Retirement Benefits (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2012	Dec. 31, 2014 Scenario, Forecast [Member]
Pension, health and life insurance expense:
Multi-employer plan contributions	$ 178,000	$ 112,000	$ 514,000	$ 327,000
Defined contribution plan contributions	169,000	147,000	530,000	432,000
Total pension expense	347,000	259,000	1,044,000	759,000
Interest cost	69,000	83,000	207,000	249,000
Amortization of prior service costs	(124,000)	(124,000)	(372,000)	(372,000)
Amortization of net loss	12,000	51,000	36,000	151,000
Net periodic benefit cost	(43,000)	10,000	(129,000)	28,000
Total post retirement benefits expense	304,000	269,000	915,000	787,000
Payments to pension plans			1,006,000
Payments for post retirement healthcare and life insurance			474,000
Document Fiscal Year Focus			2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected payments to pension plans					277,000
Expected future payments for other post retirement benefits					$ 158,000