Earnings Per Share (Schedule Of Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Earnings Per Share [Abstract]
Net income attributable to HollyFrontier stockholders	$ 152,061		$ 333,669
Participating securities' share in earnings	466		1,294
Net income attributable to common shares	$ 151,595		$ 332,375
Average number of shares of common stock outstanding	198,297,000		202,726,000
Effect of dilutive variable restricted shares and performance share units	627,000	[1]	702,000	[1]
Average number of shares of common stock outstanding assuming dilution	198,924,000		203,428,000
Basic earnings per share	$ 0.76		$ 1.64
Diluted earnings per share	$ 0.76		$ 1.63
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	14		0

[1] (1) Excludes anti-dilutive restricted and performance share units of: 14 — — —