Debt (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Carrying Amounts Of Long-Term Debt

The carrying amounts of long-term debt are as follows:

	March 31, 2017			December 31, 2016
	(In thousands)
HollyFrontier 5.875% Senior Notes
Principal	$	1,000,000		$	1,000,000
Unamortized discount and debt issuance costs	(9,023		)	(8,775		)
	990,977			991,225
HEP Credit Agreement	847,000			553,000
HEP 6% Senior Notes
Principal	400,000			400,000
Unamortized discount and debt issuance costs	(6,435		)	(6,607		)
	393,565			393,393
HEP 6.5% Senior Notes
Principal	—			300,000
Unamortized discount and debt issuance costs	—			(2,481		)
	—			297,519
Total HEP long-term debt	1,240,565			1,243,912
Total long-term debt	$	2,231,542		$	2,235,137

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

The fair values of the senior notes are as follows:

	March 31, 2017		December 31, 2016
	(In thousands)
HollyFrontier senior notes	$	1,065,320	$	1,022,500
HEP senior notes	$	422,288	$	723,750

These fair values are based on estimates provided by a third party using market quotes for similar type instruments, a Level 2 input. See Note 4 for additional information on Level 2 inputs.