CONTINGENCIES (Details) (USD $)	6 Months Ended
	Jun. 30, 2013
Guarantor Obligations [Line Items]
Issued guaranties	$ 45,818,000
Guarantor obligations, term	All of these instruments have an expiration date within five years
Expiration period for instruments under contingencies, maximum	5 years
Performance Bonds [Member]
Guarantor Obligations [Line Items]
Issued guaranties	39,690,000
Standby Letters Of Credit [Member]
Guarantor Obligations [Line Items]
Issued guaranties	$ 6,128,000
Gulfco Marine Superfund Site [Member]
Site Contingency [Line Items]
Number of other companies also named as Potentially Responsible Parties ("PRPs")	3
Number of companies named as Potentially Responsible Parties ("PRPs")	5
Palmer Barge Line Superfund Site [Member]
Site Contingency [Line Items]
Number of other companies also named as Potentially Responsible Parties ("PRPs")	45