Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 102,944,000	$ 457,200,000	$ 235,886,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	346,687,000	274,651,000	218,933,000
Stock-based compensation	20,212,000	21,503,000	18,296,000
Change in fair value of catalyst leases	(5,587,000)	2,247,000	(1,422,000)
Deferred income taxes	7,233,000	(12,526,000)	19,802,000
Non-cash change in inventory repurchase obligations	(31,790,000)	13,779,000	29,453,000
Non-cash lower of cost or market inventory adjustment	351,278,000	(295,532,000)	(521,348,000)
Debt extinguishment costs	0	25,451,000	0
Pension and other post-retirement benefit costs	47,381,000	42,242,000	37,987,000
Income from equity method investee	(17,819,000)	(14,565,000)	(5,679,000)
Distributions from equity method investee	17,819,000	20,244,000	0
(Gain) loss on sale of assets	(43,094,000)	1,458,000	11,374,000
Changes in operating assets and liabilities:
Accounts receivable	240,433,000	(335,248,000)	(161,122,000)
Due to/from affiliates	(3,512,000)	3,233,000	9,721,000
Inventories	(1,537,000)	(54,705,000)	236,602,000
Prepaid and other current assets	(2,917,000)	(9,191,000)	(5,783,000)
Accounts payable	(110,715,000)	34,527,000	213,514,000
Accrued expenses	(232,995,000)	353,115,000	227,986,000
Deferred revenue	9,631,000	(4,845,000)	8,297,000
Other assets and liabilities	1,319,000	(51,974,000)	(20,878,000)
Net cash provided by operations	694,971,000	471,064,000	551,619,000
Cash flows from investing activities:
Expenditures for property, plant and equipment	(277,258,000)	(232,656,000)	(282,430,000)
Expenditures for deferred turnaround costs	(266,028,000)	(379,114,000)	(198,664,000)
Expenditures for other assets	(17,055,000)	(31,143,000)	(42,506,000)
Proceeds from sale of assets	48,290,000	0	24,692,000
Equity method investment - return of capital	2,431,000	1,300,000	0
Net cash used in investing activities	(509,620,000)	(641,613,000)	(1,473,499,000)
Cash flows from financing activities:
Contributions from PBF LLC	287,000,000	97,000,000	450,300,000
Distributions to members	(52,587,000)	(61,149,000)	(139,434,000)
Payment received for affiliate note receivable	0	11,600,000	0
Proceeds from affiliate notes payable	0	0	43,396,000
Repayments of affiliate notes payable	0	0	(53,524,000)
Proceeds from revolver borrowings	0	490,000,000	550,000,000
Repayments of borrowings	(350,000,000)	(490,000,000)	(200,000,000)
Repayments of Notes Payable	5,621,000	1,210,000	0
Catalyst lease settlements	(9,108,000)	10,830,000	15,589,000
Deferred financing costs and other	(12,692,000)	(13,425,000)	0
Net cash (used in) provided by financing activities	(149,820,000)	70,004,000	633,836,000
Net increase (decrease) in cash and cash equivalents	35,531,000	(100,545,000)	(288,044,000)
Cash and equivalents, beginning of period	526,160,000	626,705,000	914,749,000
Cash and equivalents, end of period	561,691,000	526,160,000	626,705,000
Non-cash activities:
Accrued and unpaid capital expenditures	89,526,000	25,382,000	34,055,000
Distribution of assets to PBF Energy Company LLC	13,733,000	25,547,000	172,743,000
Conversion of affiliate notes payable to capital contribution	0	86,298,000	379,947,000
Conversion of Delaware Economic Development Authority loan to grant	0	0	4,000,000
Note payable issued for purchase of property, plant and equipment	0	6,831,000	0
Cash paid during the year for:
Interest (net of capitalized interest of $9,326, $5,937 and $8,333 in 2018, 2017 and 2016, respectively)	124,429,000	131,416,000	108,547,000
Income taxes	596,000	0	2,449,000
2025 Senior Notes [Member]
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	0	725,000,000	0
2020 Senior Secured Notes [Member]
Cash flows from financing activities:
Repayments of Long-term Debt	0	(690,209,000)	0
Rail Facility [Member]
Cash flows from financing activities:
Proceeds from revolver borrowings			35,000,000
Repayments of borrowings	0	0	(67,491,000)
Rail Term Loan [Member]
Cash flows from financing activities:
Proceeds from Issuance of Long-term Debt	0	0	35,000,000
Repayments of Long-term Debt	(6,812,000)	(6,633,000)	0
Collins Pipeline Company And T&M Terminal Company [Member]
Cash flows from financing activities:
Distributions to members	0	(1,800,000)	0
Torrance Refinery [Member]
Cash flows from investing activities:
Payments to acquire businesses	0	0	(971,932,000)
Chalmette Refinery [Member]
Cash flows from investing activities:
Payments to acquire businesses	$ 0	$ 0	$ (2,659,000)