Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Cash and cash equivalents (HEP: $6,656 and $7,776, respectively)	$ 979,872	$ 630,757
Accounts receivable: Product and transportation (HEP: $13,501 and $12,803, respectively)	765,111	659,530
Materials, supplies and other (HEP: $860 and $916, respectively)	256,536	220,554
Prepayments and other (HEP: $2,286 and $1,395, respectively)	62,604	36,909
Properties, plants and equipment, at cost (HEP: $2,030,244 and $2,011,915, respectively)	6,615,853	6,523,789
Less accumulated depreciation (HEP: $(446,355) and $(408,599), respectively)	(1,955,216)	(1,810,515)
Goodwill (HEP: $314,229 and $310,610, respectively)	2,241,047	2,244,744
Intangibles and other (HEP: $186,605 and $206,167, respectively)	422,712	439,989
Accounts payable (HEP $13,269 and $14,637, respectively)	1,243,289	1,220,795
Accrued liabilities (HEP: $28,313 and $33,214, respectively)	237,709	198,756
Long-term debt (HEP: $1,395,599 and $1,507,308, respectively)	2,387,759	2,498,993
Deferred income taxes (HEP: $558 and $525, respectively)	705,072	647,785
Other long-term liabilities (HEP: $63,374 and $62,590, respectively)	$ 229,031	$ 225,726
HollyFrontier Stockholders' Equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	320,000,000	320,000,000
Common stock, shares issued	0	256,015,550
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Treasury stock, shares	79,694,903	78,607,928
HEP
Cash and cash equivalents (HEP: $6,656 and $7,776, respectively)	$ 6,656	$ 7,776
Accounts receivable: Product and transportation (HEP: $13,501 and $12,803, respectively)	13,501	12,803
Materials, supplies and other (HEP: $860 and $916, respectively)	860	916
Prepayments and other (HEP: $2,286 and $1,395, respectively)	2,286	1,395
Properties, plants and equipment, at cost (HEP: $2,030,244 and $2,011,915, respectively)	2,030,244	2,011,915
Less accumulated depreciation (HEP: $(446,355) and $(408,599), respectively)	(446,355)	(408,599)
Goodwill (HEP: $314,229 and $310,610, respectively)	314,229	310,610
Intangibles and other (HEP: $186,605 and $206,167, respectively)	186,605	206,167
Accounts payable (HEP $13,269 and $14,637, respectively)	9,148	14,637
Accrued liabilities (HEP: $28,313 and $33,214, respectively)	33,167	33,214
Long-term debt (HEP: $1,395,599 and $1,507,308, respectively)	1,395,599	1,507,308
Deferred income taxes (HEP: $558 and $525, respectively)	558	525
Other long-term liabilities (HEP: $63,374 and $62,590, respectively)	$ 63,374	$ 62,590