STOCK-BASED COMPENSATION (Share-Based Compensation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
PBF Energy [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Granted (in shares)	2,500,742	1,638,075	1,792,000
PBF LLC [Member] | Series A Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Granted (in shares)	0	0	0
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	$ 20,212	$ 21,503	$ 18,296
Performance Shares [Member] | General and Administrative Expense [Member] | PBF Energy [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	1,207	0	0
Employee Stock Option [Member] | General and Administrative Expense [Member] | PBF Energy [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	$ 11,545	$ 9,369	$ 11,020
Restricted Stock [Member] | PBF Energy [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Granted (in shares)	58,830	762,425	360,820
Restricted Stock [Member] | General and Administrative Expense [Member] | PBF Energy [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	$ 7,460	$ 12,134	$ 7,276