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PREPAID AND OTHER CURRENT ASSETS (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
PREPAID AND OTHER CURRENT ASSETS    
Assets held for sale $ 12,194 $ 9,907
Insurance 8,899 7,642
Other prepaids 4,532 2,948
Licensing, permits and tolls 3,484 4,096
Highway and fuel taxes 819 1,238
Other assets 1,381 2,318
Total $ 31,309 $ 28,149