PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Prepaid Expense and Other Current Assets
Bunkers and lubricants	$ 6,933	$ 7,522
Insurance claims receivable	4,204	5,047
Prepaid insurance	2,306	3,185
Other	13,684	11,857
Total	27,127	27,611
Insurance claims receivable included in Other noncurrent assets	0	588
Advances to third party technical managers	7,600	4,700
Navig8 Group
Prepaid Expense and Other Current Assets
Working capital due from Navig8	1,700	1,900
Gener8 Spyridon | Prepaid Expenses and Other Current Assets | Navig8 Group
Prepaid Expense and Other Current Assets
Working capital due from Navig8		900
Gener8 Ulysses | Prepaid Expenses and Other Current Assets | Navig8 Group
Prepaid Expense and Other Current Assets
Working capital due from Navig8		$ 1,000
Gener8 Poseidon | Prepaid Expenses and Other Current Assets | Navig8 Group
Prepaid Expense and Other Current Assets
Working capital due from Navig8	1,000
Gener8 Pericles | Prepaid Expenses and Other Current Assets | Navig8 Group
Prepaid Expense and Other Current Assets
Working capital due from Navig8	$ 700