STOCK-BASED COMPENSATION (Summary of Unit Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
PBF LLC [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Unrecognized compensation expense	$ 0	$ 0
PBF LLC [Member] | Series A Units [Member]
Weighted Average Grant Date Fair Value
Forfeited	$ 0.00	$ 0.00	$ 0.00
Non-compensatory warrants outstanding	32,719	32,719
PBF LLC [Member] | Series B Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
PBF Energy [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	1,638,075	1,792,000	1,899,500
Weighted Average Grant Date Fair Value
Forfeited	$ 27.71	$ 28.74	$ 26.38
Restricted Stock [Member] | PBF Energy [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	762,425	360,820	247,720
Non-Vested Units
Units, beginning balance	521,369	294,880	85,288
Vested	172,978	134,331	38,128
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value, Amount Per Share	$ 24.99	$ 31.43	$ 32.84
Forfeited	15,100	0	0
Units, ending balance	1,095,716	521,369	294,880
Weighted Average Grant Date Fair Value
Weighted average grant date fair value, beginning balance	$ 24.89	$ 30.87	$ 31.49
Granted	25.86	22.44	30.97
Forfeited	24.18	0.00	0.00
Weighted average grant date fair value, ending balance	$ 25.56	$ 24.89	$ 30.87
Phantom Share Units (PSUs) [Member]
Non-Vested Units
Units, beginning balance	564,880	403,375	275,522
Granted	319,940	284,854	266,360
Vested	(217,171)	(116,349)	(137,007)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value, Amount Per Share	$ 23.15	$ 25.24	$ 25.83
Forfeited	(24,875)	(7,000)	(1,500)
Units, ending balance	642,774	564,880	403,375
Weighted Average Grant Date Fair Value
Weighted average grant date fair value, beginning balance	$ 22.47	$ 25.06	$ 26.56
Granted	20.97	19.95	23.92
Forfeited	21.23	23.20	26.74
Weighted average grant date fair value, ending balance	$ 21.54	$ 22.47	$ 25.06
Phantom Share Units (PSUs) [Member] | PBFX [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Unrecognized compensation expense	$ 6,662	$ 5,855
Weighted average recognized period	4 years
Weighted Average Grant Date Fair Value
Weighted average grant date fair value, beginning balance	$ 12,693,000
Weighted average grant date fair value, ending balance	$ 13,845,000	$ 12,693,000