Other Long Term Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Other Long Term Liabilities [Abstract]
Deferred Gains, net of Amortization	$ 31,298	$ 34,009
Pension and Post Retirement	10,110	10,339
Alabama Lease Incentive	6,313	6,887
Insurance Reserves	4,755	5,521
Derivatives	3,895	4,412
Other	2,283	4,138
Other Long Term Liabilities	$ 58,654	$ 65,306