Post Retirement Benefits (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension, health and life insurance expense:
Multi-employer plan contributions	$ 165,000	$ 105,000
Defined contribution plan contributions	213,000	169,000
Total pension expense	378,000	274,000
Interest cost	69,000	83,000
Amortization of prior service costs	(124,000)	(124,000)
Amortization of net loss	12,000	50,000
Net periodic benefit cost	(43,000)	9,000
Total post retirement benefits expense	335,000	283,000
Payments to pension plans	232,000
Payments for post retirement healthcare and life insurance	180,000
Expected payments to pension plans	1,063,000
Expected future payments for other post retirement benefits	$ 763,000